Systematic analysis of mass yield curves in low-energy fission of actinides
Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation bet...
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E-Artikel |
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1989 |
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Online-Ressource 10 |
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APS Digital Backfile Archive 1893-2003 |
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Enthalten in: Physical review / C - Woodbury, NY : Inst., 1970, 40(1989), 5, Seite 2144-2153 |
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volume:40 ; year:1989 ; number:5 ; pages:2144-2153 ; extent:10 |
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| 520 | |a Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. | ||
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(DE-627)NLEJ249798638 (DE-601)aps:016d1b36f90ff6b3fe8c90fed344c856ec69667a DE-627 ger DE-627 rakwb Systematic analysis of mass yield curves in low-energy fission of actinides 1989 Online-Ressource 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. APS Digital Backfile Archive 1893-2003 Ohtsuki, T. oth Hamajima, Y. oth Sueki, K. oth Nakahara, H. oth Enthalten in Physical review / C Woodbury, NY : Inst., 1970 40(1989), 5, Seite 2144-2153 Online-Ressource (DE-627)NLEJ24823787X (DE-600)1461161-2 1089-490X nnns volume:40 year:1989 number:5 pages:2144-2153 extent:10 https://www.tib.eu/de/suchen/id/aps%3A016d1b36f90ff6b3fe8c90fed344c856ec69667a Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 40 1989 5 2144-2153 10 |
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(DE-627)NLEJ249798638 (DE-601)aps:016d1b36f90ff6b3fe8c90fed344c856ec69667a DE-627 ger DE-627 rakwb Systematic analysis of mass yield curves in low-energy fission of actinides 1989 Online-Ressource 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. APS Digital Backfile Archive 1893-2003 Ohtsuki, T. oth Hamajima, Y. oth Sueki, K. oth Nakahara, H. oth Enthalten in Physical review / C Woodbury, NY : Inst., 1970 40(1989), 5, Seite 2144-2153 Online-Ressource (DE-627)NLEJ24823787X (DE-600)1461161-2 1089-490X nnns volume:40 year:1989 number:5 pages:2144-2153 extent:10 https://www.tib.eu/de/suchen/id/aps%3A016d1b36f90ff6b3fe8c90fed344c856ec69667a Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 40 1989 5 2144-2153 10 |
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(DE-627)NLEJ249798638 (DE-601)aps:016d1b36f90ff6b3fe8c90fed344c856ec69667a DE-627 ger DE-627 rakwb Systematic analysis of mass yield curves in low-energy fission of actinides 1989 Online-Ressource 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. APS Digital Backfile Archive 1893-2003 Ohtsuki, T. oth Hamajima, Y. oth Sueki, K. oth Nakahara, H. oth Enthalten in Physical review / C Woodbury, NY : Inst., 1970 40(1989), 5, Seite 2144-2153 Online-Ressource (DE-627)NLEJ24823787X (DE-600)1461161-2 1089-490X nnns volume:40 year:1989 number:5 pages:2144-2153 extent:10 https://www.tib.eu/de/suchen/id/aps%3A016d1b36f90ff6b3fe8c90fed344c856ec69667a Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 40 1989 5 2144-2153 10 |
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(DE-627)NLEJ249798638 (DE-601)aps:016d1b36f90ff6b3fe8c90fed344c856ec69667a DE-627 ger DE-627 rakwb Systematic analysis of mass yield curves in low-energy fission of actinides 1989 Online-Ressource 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. APS Digital Backfile Archive 1893-2003 Ohtsuki, T. oth Hamajima, Y. oth Sueki, K. oth Nakahara, H. oth Enthalten in Physical review / C Woodbury, NY : Inst., 1970 40(1989), 5, Seite 2144-2153 Online-Ressource (DE-627)NLEJ24823787X (DE-600)1461161-2 1089-490X nnns volume:40 year:1989 number:5 pages:2144-2153 extent:10 https://www.tib.eu/de/suchen/id/aps%3A016d1b36f90ff6b3fe8c90fed344c856ec69667a Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 40 1989 5 2144-2153 10 |
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(DE-627)NLEJ249798638 (DE-601)aps:016d1b36f90ff6b3fe8c90fed344c856ec69667a DE-627 ger DE-627 rakwb Systematic analysis of mass yield curves in low-energy fission of actinides 1989 Online-Ressource 10 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. APS Digital Backfile Archive 1893-2003 Ohtsuki, T. oth Hamajima, Y. oth Sueki, K. oth Nakahara, H. oth Enthalten in Physical review / C Woodbury, NY : Inst., 1970 40(1989), 5, Seite 2144-2153 Online-Ressource (DE-627)NLEJ24823787X (DE-600)1461161-2 1089-490X nnns volume:40 year:1989 number:5 pages:2144-2153 extent:10 https://www.tib.eu/de/suchen/id/aps%3A016d1b36f90ff6b3fe8c90fed344c856ec69667a Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 40 1989 5 2144-2153 10 |
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Systematic analysis of mass yield curves in low-energy fission of actinides |
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Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. |
| abstractGer |
Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. |
| abstract_unstemmed |
Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000naa a22002652 4500</leader><controlfield tag="001">NLEJ249798638</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20231114102833.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">231114s1989 xx |||||o 00| ||und c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ249798638</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-601)aps:016d1b36f90ff6b3fe8c90fed344c856ec69667a</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Systematic analysis of mass yield curves in low-energy fission of actinides</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1989</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">10</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Mass yield curves in low-energy proton-induced fissions of U233, U235, U238, Np237, Pu239, Pu242, Pu244, Am241, and Am243 were measured. The full widths at half maximum (FWHM) of the heavier asymmetric peak of the mass yield curves showed a sudden dip in the region of Af=240–245. The correlation between the P/V ratio and the FWHM of the asymmetric mass yield peak was obtained as a function of proton energy. The FWHM values were independent of the incident proton energy as long as the P/V ratio was larger than 10 for all the fissioning systems studied. The excitation energy dependence of the mass yield curves was investigated. It was found that the excitation energy dependence of symmetrically divided fission products was apparently different from that of asymmetrically divided ones. With a simple assumption of the two-mode hypothesis, the observed mass yield curves could be decomposed into two mass yield curves. Asymmetric mass yield peaks could be best represented by the sum of two Gaussians, and their variation could be expressed by the variation of Gaussian parameters. The peak positions of the two Gaussians were always A=133–135 and A=140–142 for all the investigated fissioning nuclides. The preference of those fragment masses is discussed in terms of both the scission-point model and the saddle-point model.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">APS Digital Backfile Archive 1893-2003</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Ohtsuki, T.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hamajima, Y.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Sueki, K.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Nakahara, H.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Physical review / C</subfield><subfield code="d">Woodbury, NY : Inst., 1970</subfield><subfield code="g">40(1989), 5, Seite 2144-2153</subfield><subfield code="h">Online-Ressource</subfield><subfield code="w">(DE-627)NLEJ24823787X</subfield><subfield code="w">(DE-600)1461161-2</subfield><subfield code="x">1089-490X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:40</subfield><subfield code="g">year:1989</subfield><subfield code="g">number:5</subfield><subfield code="g">pages:2144-2153</subfield><subfield code="g">extent:10</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://www.tib.eu/de/suchen/id/aps%3A016d1b36f90ff6b3fe8c90fed344c856ec69667a</subfield><subfield code="x">Verlag</subfield><subfield code="z">Deutschlandweit zugänglich</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-APS</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">40</subfield><subfield code="j">1989</subfield><subfield code="e">5</subfield><subfield code="h">2144-2153</subfield><subfield code="g">10</subfield></datafield></record></collection>
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7.400342 |