Fission dynamics using the decay of the giant dipole resonance

C. R. Morton; A. Buda; P. Paul; N. P. Shaw; J. R. Beene; N. Gan; M. L. Halbert; D. W. Stracener; R. L. Varner; M. Thoennessen; P. Thirol; I. Diószegi

doi:10.1088/0954-3899/23/10/028

Fission dynamics using the decay of the giant dipole resonance

C. R. Morton, A. Buda, P. Paul, N. P. Shaw, J. R. Beene, N. Gan, M. L. Halbert, D. W. Stracener, R. L. Varner, M. Thoennessen, P. Thirol, I. Diószegi

Medical Isotopes and Development

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Abstract

High-energy γ-rays from the decay of the giant dipole resonance built on excited states were measured in coincidence with fission for the ³²S + ^naiW, ²⁰⁸Pb reactions. Both the γ-ray multiplicity and the γ-fission angular correlation were determined; the latter quantity is sensitive to the deformation of the fissioning nucleus. This sensitivity has been used in order to estimate the breakdown of dynamical fission time τ_f into its pre-τ_pre and post-saddle τ_post components. A statistical model analysis, using a version of CASCADE modified to include pre-and post-saddle delay times in order to simulate the effects of dynamics, can reproduce the data with τ_pre ≈ 10 × 10^-21 s and τ_post ≈ 20 × 10^-21 s for a dynamical fission time τ_f ≈ 30 × 10^-21 s.

Original language	English
Pages (from-to)	1383-1392
Number of pages	10
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	23
Issue number	10
DOIs	https://doi.org/10.1088/0954-3899/23/10/028
State	Published - Oct 1997

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title = "Fission dynamics using the decay of the giant dipole resonance",

abstract = "High-energy γ-rays from the decay of the giant dipole resonance built on excited states were measured in coincidence with fission for the 32S + naiW, 208Pb reactions. Both the γ-ray multiplicity and the γ-fission angular correlation were determined; the latter quantity is sensitive to the deformation of the fissioning nucleus. This sensitivity has been used in order to estimate the breakdown of dynamical fission time τf into its pre-τpre and post-saddle τpost components. A statistical model analysis, using a version of CASCADE modified to include pre-and post-saddle delay times in order to simulate the effects of dynamics, can reproduce the data with τpre ≈ 10 × 10-21 s and τpost ≈ 20 × 10-21 s for a dynamical fission time τf ≈ 30 × 10-21 s.",

author = "Morton, {C. R.} and A. Buda and P. Paul and Shaw, {N. P.} and Beene, {J. R.} and N. Gan and Halbert, {M. L.} and Stracener, {D. W.} and Varner, {R. L.} and M. Thoennessen and P. Thirol and I. Di{\'o}szegi",

year = "1997",

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doi = "10.1088/0954-3899/23/10/028",

language = "English",

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pages = "1383--1392",

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TY - JOUR

T1 - Fission dynamics using the decay of the giant dipole resonance

AU - Morton, C. R.

AU - Buda, A.

AU - Paul, P.

AU - Shaw, N. P.

AU - Beene, J. R.

AU - Gan, N.

AU - Halbert, M. L.

AU - Stracener, D. W.

AU - Varner, R. L.

AU - Thoennessen, M.

AU - Thirol, P.

AU - Diószegi, I.

PY - 1997/10

Y1 - 1997/10

N2 - High-energy γ-rays from the decay of the giant dipole resonance built on excited states were measured in coincidence with fission for the 32S + naiW, 208Pb reactions. Both the γ-ray multiplicity and the γ-fission angular correlation were determined; the latter quantity is sensitive to the deformation of the fissioning nucleus. This sensitivity has been used in order to estimate the breakdown of dynamical fission time τf into its pre-τpre and post-saddle τpost components. A statistical model analysis, using a version of CASCADE modified to include pre-and post-saddle delay times in order to simulate the effects of dynamics, can reproduce the data with τpre ≈ 10 × 10-21 s and τpost ≈ 20 × 10-21 s for a dynamical fission time τf ≈ 30 × 10-21 s.

AB - High-energy γ-rays from the decay of the giant dipole resonance built on excited states were measured in coincidence with fission for the 32S + naiW, 208Pb reactions. Both the γ-ray multiplicity and the γ-fission angular correlation were determined; the latter quantity is sensitive to the deformation of the fissioning nucleus. This sensitivity has been used in order to estimate the breakdown of dynamical fission time τf into its pre-τpre and post-saddle τpost components. A statistical model analysis, using a version of CASCADE modified to include pre-and post-saddle delay times in order to simulate the effects of dynamics, can reproduce the data with τpre ≈ 10 × 10-21 s and τpost ≈ 20 × 10-21 s for a dynamical fission time τf ≈ 30 × 10-21 s.

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U2 - 10.1088/0954-3899/23/10/028

DO - 10.1088/0954-3899/23/10/028

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SN - 0954-3899

VL - 23

SP - 1383

EP - 1392

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 10

ER -

Fission dynamics using the decay of the giant dipole resonance

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