Mass Equilibration and Fluctuations in the Angular Momentum Dependent Dynamics of Heavy Element Synthesis Reactions

T. Tanaka, D. J. Hinde, M. Dasgupta, E. Williams, K. Vo-Phuoc, C. Simenel, E. C. Simpson, D. Y. Jeung, I. P. Carter, K. J. Cook, N. R. Lobanov, D. H. Luong, C. Palshetkar, D. C. Rafferty, and K. Ramachandran

Phys. Rev. Lett. 127, 222501 – Published 24 November 2021

Abstract

Mass and angle distributions for the ${}^{52}{Cr} + {}^{198}{Pt}$ and ${}^{54}{Cr} + {}^{196}{Pt}$ reactions (both forming ${}^{250}{No}$ ) were measured and subtracted, giving new information on fast quasifission mass evolution, and the first direct determination of the dependence of sticking times on angular momentum. TDHF calculations showed good agreement with average experimental values, but experimental mass distributions unexpectedly extended to symmetric splits while the peak yield remained close to the initial masses. This implies a strong role of fluctuations in mass division early in the collision, giving insights into the transition from fast energy dissipative deep-inelastic collisions to quasifission.

Received 16 August 2021
Revised 12 October 2021
Accepted 10 November 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.222501

Physics Subject Headings (PhySH)

Fission Nuclear fusion Nuclear reactions

Nuclear Physics

Authors & Affiliations

T. Tanaka ¹, D. J. Hinde ¹, M. Dasgupta¹, E. Williams ¹, K. Vo-Phuoc¹, C. Simenel^1,2, E. C. Simpson¹, D. Y. Jeung ¹, I. P. Carter ¹, K. J. Cook^1,*, N. R. Lobanov ¹, D. H. Luong ¹, C. Palshetkar¹, D. C. Rafferty¹, and K. Ramachandran^1,†

¹Department of Nuclear Physics and Accelerator Applications, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
²Department of Fundamental and Theoretical Physics, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia

^*Present address: Facility for Rare Isotope Beams and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
^†Permanent address: Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.

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Issue

Vol. 127, Iss. 22 — 24 November 2021

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