TOTAL CROSS-SECTION FOR (GAMMA,PI-) REACTIONS IN THE DELTA-REGION

被引：22

作者：

BOSTED, PE ^{[1
]}

BLOMQVIST, KI ^{[1
]}

BERNSTEIN, AM ^{[1
]}

机构：

[1] MIT,NUCL SCI LAB,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 43卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.43.1473

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Total cross sections for C12(γ,π-)N12 and Li7(γ,π-)Be7 have been measured from threshold to 360 MeV photon energy by detecting the radioactivity of the residual nuclei, thereby singling out the ground state of N12 and the ground and first excited states of Be7. The cross sections are found to peak at about 40 MeV pion energy and then to fall gradually. In contrast to pion charge exchange and other photopion experiments, these results are well reproduced both in shape and in magnitude by distorted-wave impulse-approximation calculations. © 1979 The American Physical Society.

引用

页码：1473 / 1476

页数：4

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