New evaluated data on Pb photodisintegration

V. V. Varlamov; A. I. Davydov; V. N. Orlin

doi:10.1140/epja/s10050-021-00594-6

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
qt
am
n

2024 Impact factor 2.8

Hadrons and Nuclei

Eur. Phys. J. A (2021) 57: 287
https://doi.org/10.1140/epja/s10050-021-00594-6

Regular Article - Experimental Physics

New evaluated data on $^{206, 207, 208}$ $^{{{206,207,208}}}$ Pb photodisintegration

V. V. Varlamov¹^a, A. I. Davydov² and V. N. Orlin¹

¹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia
² Physics Faculty, Lomonosov Moscow State University, 119991, Moscow, Russia

^a vvvarlamov@gmail.com

Received: 7 April 2021
Accepted: 29 September 2021
Published online: 15 October 2021

Abstract

New cross sections of the partial ( $γ, 1 n)$ $\gamma ,1n)$ , ( $γ, 2 n)$ $\gamma ,2n)$ , and ( $γ$ $\gamma$ , 3n) and total ( $γ$ $\gamma$ , Sn), and ( $γ$ $\gamma$ , tot) photoneutron reactions for $^{206, 207}$ $^{{206,207}}$ Pb were evaluated using the experimental-theoretical method. The evaluation procedure was based on the comparison in detail of $^{206, 207}$ $^{{206,207}}$ Pb data obtained only at Livermore (USA) with $^{208}$ $^{{208}}$ Pb data obtained at Livermore, Saclay (France) and also in other experiments. It was found that in the cases of all $^{206, 207, 208}$ $^{{206,207,208}}$ Pb isotopes clear disagreements between Livermore data and new evaluated data can be explained by the assumption of loss of many neutrons in experimental ( $γ$ $\gamma$ , 1n) reaction cross sections. It was shown that Livermore experimental data for $^{206, 207, 208}$ $^{{206,207,208}}$ Pb as well as for $^{75}$ $^{{75}}$ As, $^{127}$ $^{{127}}$ I, and $^{181}$ $^{{181}}$ Ta investigated before are not reliable.