Total photoabsorption cross sections for H-1, H-2, and He-3 from 200 to 800 MeV

被引：129

作者：

MacCormick, M

Audit, G

dHose, N

Ghedira, L

Isbert, V

Kerhoas, S

Murphy, LY

Tamas, G

Wallace, PA

Altieri, S

Braghieri, A

Pedroni, P

Pinelli, T

Ahrens, J

Beck, R

Annand, JRM

Crawford, RA

Kellie, JD

MacGregor, IJD

Dolbilkin, B

Zabrodin, A

机构：

[1] CTR ETUD SACLAY, DAPNIA, SERV PHYS NUCL, F-91191 GIF SUR YVETTE, FRANCE

[2] IST NAZL FIS NUCL, SEZ PAVIA, I-27100 PAVIA, ITALY

[3] UNIV PAVIA, DIPARTIMENTO FIS NUCL & TEOR, I-27100 PAVIA, ITALY

[4] UNIV MAINZ, INST KERNPHYS, D-55099 MAINZ, GERMANY

[5] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW, LANARK, SCOTLAND

[6] INST NUCL RES, MOSCOW 117312, RUSSIA

[7] FAC SCI, MONASTIR 5000, TUNISIA

[8] GLASGOW CALEDONIA UNIV, DEPT PHYS SCI, GLASGOW G4 0BA, LANARK, SCOTLAND

来源：

PHYSICAL REVIEW C | 1996年 / 53卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.53.41

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 total photoabsorption. cross sections for H-1, H-2, and He-3 have been measured for incident photon energies ranging from 200 to 800 MeV. The He-3 data are the first for this nucleus. By using the large acceptance detector DAPHNE in conjunction with the tagged photon beam facility of the MAMI accelerator in Mainz, cross sections of high precision have been obtained. The results show clearly the changes in the nucleon resonances in going from H-1 to He-3. In particular, for the D-13 region the behavior for He-3 is intermediate between that for H-1, H-2, and heavier nuclei. This will provide a strong constraint to the theories that are presently being developed with a view to explaining the apparent ''damping'' of higher resonances in heavy nuclei.

引用

页码：41 / 49

页数：9

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