Observation of shape isomers states in fission fragments

11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Kamanin, D.V.^1 ; Pyatkov, Yu V^1,2 ; Alexandrov, A.A.^1 ; Alexandrova, I.A.^1 ; Mkaza, N.^3 ; Malaza, V.^3 ; Kuznetsova, E.A.^1 ; Strekalovsky, A.O.^1 ; Strekalovsky, O.V.^1 ; Zhuchko, V.E.^1

Joint Institute for Nuclear Research, Dubna, Russia^1

National Nuclear Research University, MEPhI (Moscow Engineering Physics Institute), Moscow, Russia^2

University of Stellenbosch, Faculty of Military Science, Military Academy, Saldanha

7395, South Africa^3

关键词: Fission fragment;    Fission neutrons;    Frontal impacts;    Rutherford scattering;    Total mass;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/863/1/012045/pdf
DOI  :  10.1088/1742-6596/863/1/012045

来源: IOP

【 摘 要 】

We discuss the manifestations of a new original effect appeared at crossing of the metal foils by fission fragments. We have observed significant mass deficit in the total mass Msof the fission fragments detected in coincidence with ions knocked out from the foil. It was shown that at the large angles of scattering of the knocked-out ions from the foil predominantly conventional elastic Rutherford scattering takes place. As the result Mscorresponds to the mean mass of the mother system after emission of fission neutrons (no missing mass). In contrast, in near frontal impacts fission fragment misses essential part of its mass. Residual nuclei at least for the fragments from the heavy mass peak show magic nucleon composition.