QUASI-FREE PHOTOPRODUCTION OF CHARGED PIONS FROM COPPER AND LEAD

被引：13

作者：

BABA, K

ENDO, I

FUJISAKI, M

KADOTA, S

SUMI, Y

FUJII, H

MURATA, Y

NOGUCHI, S

MURAKAMI, A

机构：

[1] UNIV TOKYO,INST NUCL STUDY,TOKYO 113,JAPAN

[2] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[3] SAGA UNIV,DEPT PHYS,SAGA 840,JAPAN

来源：

NUCLEAR PHYSICS A | 1979年 / 322卷 / 2-3期

关键词：

D O I：

10.1016/0375-9474(79)90430-5

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 photoproduction of charged pions in the sub GeV region has been studied for two nuclear targets, copper and lead, by using a magnetic spectrometer. The photon energies are determined in steps of 50 MeV by a subtraction method for the bremsstrahlung spectrum. The observed pion momentum spectra reveal characteristic features of quasi-free production (QFP) even for such heavy nuclei as copper and lead. The data are compared with results obtained by a PWIA calculation, which give a good fit to the data. The QFP cross sections per relevant nucleon at 44.2° and the average photon energy 〈k〉 = 668 MeV are found to be approximately proportional to A- 1 3. © 1979.

引用

页码：349 / 360

页数：12

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