On the fission width of isobaric analogue states

Yadrovsky, E.L.

doi:10.1016/0370-2693(75)90431-1

Cited by 3 publications

(10 citation statements)

References 9 publications

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“…In this work, we present empirical evidence which further supports the significant role being played by isospin in the heavy mass region, and is based on the idea proposed by Yadrovsky [1]. Yadrovsky, in 1975, considered a set of proton and alpha induced reactions, namely 209 Bi(p, f) and 206 Pb(α, f) leading to the same CN 210 Po, but populated in different isospin states. The fission decay widths from two different isospin states of CN at various excitation energies were then compared [1].…”

Section: Introductionsupporting

confidence: 54%

“…and found a difference of the order of 10 4 -10 5 between the two, which lead him to conclude that "a nucleus remembers the isospin values of the nuclear states leading to fission" [1]. However, in one of the approaches, we calculate the fission branching ratios by using the values of σ p,f and σ α,f in Eq.…”

Section: Isospin Dependence Of Fission Branching Ratiosmentioning

confidence: 99%

“…Yadrovsky, in 1975, considered a set of proton and alpha induced reactions, namely 209 Bi(p, f) and 206 Pb(α, f) leading to the same CN 210 Po, but populated in different isospin states. The fission decay widths from two different isospin states of CN at various excitation energies were then compared [1]. The difference between the fission decay widths in different isospin states was found to be quite large, and it was concluded that "a nucleus remembers the isospin values of the nuclear states leading to fission".…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we revisit the idea of Yadrovsky [1] with more precise and newer data sets. We calculate the fission branching ratios from two isospin states of CN using an approach very similar to that used by Yadrovsky for three pairs of reactions; one pair of reactions is the same as used by Yadrovsky but with an improved data set.…”

Section: Introductionmentioning

confidence: 99%

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Empirical Evidence of Isospin Memory in Compound Nuclear Fission

Garg,

Jain

2019

Preprint

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We present empirical evidence of isospin dependence in the compound nuclear fission cross-sections and fission widths, which suggests that the compound nucleus (CN) possibly retains the memory of the isospin when it is formed. We examine the idea, first proposed by Yadrovsky [1], for three pairs of reactions where experimental data of fission cross section at various excitation energies are available. One of the pairs of reactions is the same as used by Yadrovsky i.e. 209 Bi(p, f) and 206 Pb(α, f) leading to the CN 210 Po but with an improved experimental data set. The other two pairs of reaction sets are, 185 Re(p, f) and 182 W(α, f) leading to the CN 186 Os and, 205 Tl(p, f) and 202 Hg(α, f) leading to the CN 206 Pb. An observable difference between the fission branching ratios in two different isospin states suggests that the CN seems to remember its isospin at the point of formation. This possibility is further supported by another method, where additional empirical evidence for four CN, viz. 210 Po, 209 Bi, 207 Bi, and 198 Hg, is obtained from the experimental data in Zhukova et al. [2]. Further, the data also suggest a possible new signature of the weakening of CN process and gradual transition to non-compound processes as the energy rises. Fresh experimental efforts as proposed, are required to confirm these findings.

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Section: Introductionsupporting

confidence: 54%

Section: Isospin Dependence Of Fission Branching Ratiosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Empirical Evidence of Isospin Memory in Compound Nuclear Fission

Garg,

Jain

2019

Preprint

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“…We then compare the fission widths for the two isospin states of CN. More specifically, we have chosen the combination of 206 Pb(α,f) and 209 Bi(p,f) same as presented in Yadrovsky's paper [1] in this study. A significant difference between the ratios of fission decay widths to total decay widths for different isospin values suggests that isospin plays an important role in fission.…”

mentioning

confidence: 99%

Does Compound Nucleus remember its Isospin- An Evidence from the Fission Widths

Garg¹

2018

EPJ Web Conf.

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We present an evidence of isospin effects in nuclear fission by comparing the fission widths for reactions involving different isospin states of the same compound nucleus (CN). Yadrovsky [1] suggested this possibility in 1975. Yadrovsky obtained the fission widths for two reaction data sets, namely 206 Pb(α,f) and 209 Bi(p,f), both leading to same CN, and concluded that "a nucleus remembers the isospin value of the nuclear states leading to fission". We obtain the fission decay widths for both the T 0 + 1 2 and T 0 − 1 2 states of CN by using two appropriate reaction data sets. We then compare the fission widths for the two isospin states of CN. More specifically, we have chosen the combination of 206 Pb(α,f) and 209 Bi(p,f) same as presented in Yadrovsky's paper [1] in this study. A significant difference between the ratios of fission decay widths to total decay widths for different isospin values suggests that isospin plays an important role in fission.

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