GAMMA-RAY MEASUREMENT OF EU-152 PRODUCED BY NEUTRONS FROM THE HIROSHIMA ATOMIC-BOMB AND EVALUATION OF NEUTRON FLUENCE

被引：5

作者：

KATO, K

HABARA, M

AOYAMA, T

SAKATA, H

YOSHIZAWA, Y

机构：

[1] HIROSHIMA UNIV,NUCL MED & BIOL RES INST,HIROSHIMA 734,JAPAN

[2] HIROSHIMA UNIV,FAC SCI,DEPT PHYS,HIROSHIMA 730,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 08期

关键词：

!sup]152[!/sup]Eu; Atomic bomb; Chemical isolation; Gamma-ray spectrometry; Neutron fluence;

D O I：

10.1143/JJAP.29.1546

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The 152Eu/Eu ratios were measured in a tombstone exposed to neutrons of the Hiroshima atomic bomb near the hypocenter. Measurements of 152Eu gamma rays were performed for europium samples chemically isolated from numerous rock specimens taken from the tombstone. A reliable attenuation curve of the 152Eu/Eu ratios was obtained. The curve suggests that the thermal neutron component was relatively small and the average incident angle of neutrons to the tombstone was roughly 45°C from the perpendicular downward direction. It revealed to us several important pieces of information concerning the energy and angular distributions near the Hiroshima bomb hypocenter. © 1990 The Japan Society of Applied Physics.

引用

页码：1546 / 1549

页数：4

共 11 条

[1] MEASUREMENTS OF NEUTRON FLUENCE FROM THE HIROSHIMA ATOMIC-BOMB [J].

KATO, K ;

HABARA, M ;

AOYAMA, T ;

YOSHIZAWA, Y ;

BIEBEL, U ;

HABERSTOCK, G ;

HEINZL, J ;

KORSCHINEK, G ;

MORINAGA, H ;

NOLTE, E .

JOURNAL OF RADIATION RESEARCH, 1988, 29 (04) :261-266

[2]

KATO K, 1987, ANAL SCI, V3, P489

[3]

MUGHABGHAB SF, 1973, BNL325, V1

[4]

OKAJIMA S, 1983, P US JAPAN JOINT WOR, P156

[5]

PACE JV, 1982, DOE S SERIES, V55, P131

[6]

PACE JV, 1983, P US JAPAN JOINT WOR, P218

[7]

SAKANOUE M, 1981, IAEASTIPUS592, P105

[8]

THORNGATE JH, 1965, CEX647 ORNL

[9]

WHALEN PP, 1983, P US JAPAN JOINT WOR, P13

[10] PRECISION-MEASUREMENTS OF GAMMA-RAY INTENSITIES .2. EU-152, EU-154 AND IR-192 [J].

YOSHIZAWA, Y ;

IWATA, Y ;

IINUMA, Y .

NUCLEAR INSTRUMENTS & METHODS, 1980, 174 (1-2) :133-139

← 1 2 →