Extraction Time Simulations of a Cryogenic Gas Stopping Cell Designed to Study the Properties of Superheavy Elements

IF 0.4 Q4 PHYSICS, PARTICLES & FIELDS Physics of Particles and Nuclei Letters Pub Date : 2024-08-14 DOI:10.1134/S1547477124701127

A. Kohoutova, A. M. Rodin, A. V. Gulyaev, A. V. Gulyaeva, V. Yu. Vedeneev, A. M. Abakumov, J. Kliman, A. B. Komarov, P. Kohout, L. Krupa, N. Yu. Kurkova, A. Maheer, A. S. Novoselov, A. Opichal, J. Pechousek, A. V. Podshibyakin, V. S. Salamatin, S. V. Stepantsov, E. V. Chernysheva, S. A. Yukhimchuk

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Abstract

—New experimental setup for high-precision mass measurement of heavy and superheavy nuclei is being built in Flerov Laboratory of Nuclear Reactions (Dubna). It consists of target unit, gas filled separator of complete fusion products, cryogenic gas stopping cell (CGSC), a radiofrequency system for transporting and cooling a low-energy beam and a multi-reflection time-of-flight mass spectrometer. Simulations of stopping efficiency and extraction time from CGSC were performed for evaporation residues of the complete fusion reactions ⁴⁰Ar + ¹⁴⁴Sm → ^184–xHg + xn, ⁴⁰Ar + ¹⁶⁶Er → ^206–xRn + xn, ⁴⁸Ca + ²⁰⁸Pb → ^256–xNo + xn and ⁴⁸Ca + ²⁴²Pu → ^290–xFl + xn. Internal software based on SRIM and Geant4 was used in the simulations. Optimum parameters for the real experiment, namely, the width of entrance window, pressure of helium buffer-gas in CGSC and the choice of suitable reactions were the main motivation of these simulations.

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为研究超重元素特性而设计的低温气体截留室的萃取时间模拟

-弗列罗夫核反应实验室（杜布纳）正在建造用于高精度测量重核和超重核质量的新实验装置。该装置包括靶单元、完整聚变产物气体填充分离器、低温气体停止室（CGSC）、用于传输和冷却低能束的射频系统以及多反射飞行时间质谱仪。对完全核聚变反应 40Ar + 144Sm → 184-xHg + xn、40Ar + 166Er → 206-xRn + xn、48Ca + 208Pb → 256-xNo + xn 和 48Ca + 242Pu → 290-xFl + xn 的蒸发残留物进行了停止效率和从 CGSC 提取时间的模拟。模拟中使用了基于 SRIM 和 Geant4 的内部软件。实际实验的最佳参数，即入口窗口的宽度、CGSC 中氦缓冲气体的压力以及合适反应的选择，是这些模拟的主要动机。

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来源期刊

Physics of Particles and Nuclei Letters PHYSICS, PARTICLES & FIELDS-

CiteScore

0.80

自引率

20.00%

发文量

108

期刊介绍： The journal Physics of Particles and Nuclei Letters, brief name Particles and Nuclei Letters, publishes the articles with results of the original theoretical, experimental, scientific-technical, methodological and applied research. Subject matter of articles covers: theoretical physics, elementary particle physics, relativistic nuclear physics, nuclear physics and related problems in other branches of physics, neutron physics, condensed matter physics, physics and engineering at low temperatures, physics and engineering of accelerators, physical experimental instruments and methods, physical computation experiments, applied research in these branches of physics and radiology, ecology and nuclear medicine.