The emission of prompt neutrons from the spontaneous fission of 252No and 244Fm

被引：19
|
作者：
Svirikhin, A. I. [1 ]
Andreev, A. V. [2 ]
Dushin, V. N. [3 ]
Chelnokov, M. L. [1 ]
Chepigin, V. I. [1 ]
Gupta, M. [4 ]
Isaev, A. V. [1 ]
Izosimov, I. N. [1 ]
Katrasev, D. E. [1 ]
Kuznetsov, A. N. [1 ]
Malyshev, O. N. [1 ]
Mullins, S. [5 ]
Popeko, A. G. [1 ]
Sokol, E. A. [1 ]
Yeremin, A. V. [1 ]
机构：
[1] Joint Inst Nucl Res, Flerov Lab Nucl React, Dubna 141980, Russia
[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia
[3] VG Khlopin Radium Inst, St Petersburg 194021, Russia
[4] Manipal Univ, Manipal 576104, Karnataka, India
[5] Lab Accelerator Based Sci, ZA-7129 Somerset W, South Africa
来源：
EUROPEAN PHYSICAL JOURNAL A | 2012年 / 48卷 / 09期
基金：
俄罗斯基础研究基金会;
关键词：
SEPARATOR VASSILISSA; FRAGMENT-MASS; MULTIPLICITY; DISTRIBUTIONS; DETECTOR;
D O I：
10.1140/epja/i2012-12121-7
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The neutron detector with He-3-filled counters placed in the focal plane of the VASSILISSA separator is used for measuring the average number and determining the multiplicity distribution of prompt neutrons from the spontaneous fission of heavy short-lived isotopes. The test reaction Ca-48 + Pb-206 = 2n+No-252 is used for tuning the separator settings and calibrating the detector system with the spontaneous fission of the No-252. The average neutron number per No-252 spontaneous fission event is as large as (nu) over bar = 4.06 +/- 0.12. The short-lived heavy isotope Fm-244, produced in the complete fusion reaction Ar-40 + Pb-206, is investigated. The average number of neutrons per spontaneous fission of 244Fm from the experimental data ((nu) over bar = 3.3 +/- 0.3) is determined for the first time.
引用
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页码：1 / 6
页数：6
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