Memory of entrance-channel deformation for fast-fission

C. R. Morton; D. J. Hinde; A. C. Berriman; R. D. Butt; M. Dasgupta; A. Godley; J. O. Newton

doi:10.1016/S0370-2693(00)00470-6

Memory of entrance-channel deformation for fast-fission

C. R. Morton^*, D. J. Hinde, A. C. Berriman, R. D. Butt, M. Dasgupta, A. Godley, J. O. Newton

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Fission fragment anisotropies following fusion of ³⁴S with ¹⁶⁸Er have been measured for energies at which a substantial fraction of fission results from angular momenta where the fission barrier height is less than the temperature. Here, transition state model calculations were found to be larger than the measured anisotropies. This result contrasts with data for ¹⁹F +²⁰⁸Pb, where the transition state model underestimated the measured anisotropies. Both observations can be explained qualitatively assuming that high angular momentum events fission with some memory of the entrance-channel K-distribution, which is narrow for the spherical ²⁰⁸Pb target nucleus, and broad for the deformed ¹⁶⁸Er. (C) 2000 Elsevier Science B.V.

Original language	English
Pages (from-to)	160-164
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	481
Issue number	2-4
DOIs	https://doi.org/10.1016/S0370-2693(00)00470-6
Publication status	Published - 25 May 2000

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title = "Memory of entrance-channel deformation for fast-fission",

abstract = "Fission fragment anisotropies following fusion of 34S with 168Er have been measured for energies at which a substantial fraction of fission results from angular momenta where the fission barrier height is less than the temperature. Here, transition state model calculations were found to be larger than the measured anisotropies. This result contrasts with data for 19F +208Pb, where the transition state model underestimated the measured anisotropies. Both observations can be explained qualitatively assuming that high angular momentum events fission with some memory of the entrance-channel K-distribution, which is narrow for the spherical 208Pb target nucleus, and broad for the deformed 168Er. (C) 2000 Elsevier Science B.V.",

keywords = "Fast-fission, Fission fragment angular distributions, Fusion-fission, Statistical model, Transition state model",

author = "Morton, {C. R.} and Hinde, {D. J.} and Berriman, {A. C.} and Butt, {R. D.} and M. Dasgupta and A. Godley and Newton, {J. O.}",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Memory of entrance-channel deformation for fast-fission

AU - Morton, C. R.

AU - Hinde, D. J.

AU - Berriman, A. C.

AU - Butt, R. D.

AU - Dasgupta, M.

AU - Godley, A.

AU - Newton, J. O.

PY - 2000/5/25

Y1 - 2000/5/25

N2 - Fission fragment anisotropies following fusion of 34S with 168Er have been measured for energies at which a substantial fraction of fission results from angular momenta where the fission barrier height is less than the temperature. Here, transition state model calculations were found to be larger than the measured anisotropies. This result contrasts with data for 19F +208Pb, where the transition state model underestimated the measured anisotropies. Both observations can be explained qualitatively assuming that high angular momentum events fission with some memory of the entrance-channel K-distribution, which is narrow for the spherical 208Pb target nucleus, and broad for the deformed 168Er. (C) 2000 Elsevier Science B.V.

AB - Fission fragment anisotropies following fusion of 34S with 168Er have been measured for energies at which a substantial fraction of fission results from angular momenta where the fission barrier height is less than the temperature. Here, transition state model calculations were found to be larger than the measured anisotropies. This result contrasts with data for 19F +208Pb, where the transition state model underestimated the measured anisotropies. Both observations can be explained qualitatively assuming that high angular momentum events fission with some memory of the entrance-channel K-distribution, which is narrow for the spherical 208Pb target nucleus, and broad for the deformed 168Er. (C) 2000 Elsevier Science B.V.

KW - Fast-fission

KW - Fission fragment angular distributions

KW - Fusion-fission

KW - Statistical model

KW - Transition state model

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U2 - 10.1016/S0370-2693(00)00470-6

DO - 10.1016/S0370-2693(00)00470-6

M3 - Article

SN - 0370-2693

VL - 481

SP - 160

EP - 164

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-4

ER -

Memory of entrance-channel deformation for fast-fission

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