THE HE-4(GAMMA, 2N) REACTION MEASURED WITH TAGGED PHOTONS

被引：16

作者：

DORAN, SM

MACGREGOR, IJD

ANNAND, JRM

ANTHONY, I

DANCER, SN

HALL, SJ

KELLIE, JD

MCGEORGE, JC

MILLER, GJ

OWENS, RO

WALLACE, PA

SCHOCH, B

SCHMIEDEN, H

KLEIN, S

机构：

[1] UNIV GLASGOW,DEPT PHYS & ASTRON,UNIV AVE,GLASGOW G12 8QQ,SCOTLAND

[2] UNIV MAINZ,INST KERNPHYS,W-6500 MAINZ,GERMANY

[3] UNIV TUBINGEN,INST PHYS,W-7400 TUBINGEN 1,GERMANY

来源：

NUCLEAR PHYSICS A | 1993年 / 559卷 / 03期

关键词：

HE-4(GAMMA; PN) (GAMMA; PP); E = 80-131 MEV; MEASURED YIELD; RECOIL MOMENTUM; DEDUCED-SIGMA; NATURAL TARGET; TAGGED PHOTONS; MONTE-CARLO CALCULATIONS;

D O I：

10.1016/0375-9474(93)90158-T

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 results of tagged-photon measurements of the He-4(gamma, pn)d, He-4(gamma, pn)pn and He-4(gamma, pp)nn reactions, carried out with photons of energies 80-131 MeV, are presented. The (gamma, pn)d three-body-breakup cross section dominates the four-body-breakup cross section. The three-body-breakup cross section and the corresponding deuteron recoil-momentum spectrum are reasonably accounted for by a mechanism of photon absorption on correlated proton-neutron pairs. In contrast the four-body-breakup mechanism appears to have two components: absorption on correlated proton-neutron pairs and a more complex additional component which has a distribution similar to phase space. The data rule out substantial photon absorption on proton-proton pairs.

引用

页码：347 / 367

页数：21

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