Near-threshold deuteron photodisintegration:: An indirect determination of the Gerasimov-Drell-Hearn sum rule and forward spin polarizability (γ0) for the deuteron at low energies

被引：23

作者：

Ahmed, M. W. ^{[1
,2
]}

Blackston, M. A. ^{[1
,2
]}

Perdue, B. A. ^{[1
,2
]}

Tornow, W. ^{[1
,2
]}

Weller, H. R. ^{[1
,2
]}

Norum, B. ^{[3
]}

Sawatzky, B. ^{[3
]}

Prior, R. M. ^{[4
]}

Spraker, M. C. ^{[4
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

[2] Triangle Univ Nucl Lab, Durham, NC 27708 USA

[3] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA

[4] N Georgia Coll & State Univ, Dahlonega, GA 30597 USA

来源：

PHYSICAL REVIEW C | 2008年 / 77卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.77.044005

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：

It is shown that a measurement of the analyzing power obtained with linearly polarized gamma-rays and an unpolarized target can provide an indirect determination of two physical quantities. These are the Gerasimov-Drell-Hearn (GDH) sum rule integrand for the deuteron and the sum rule integrand for the forward spin polarizability (gamma(0)) near photodisintegration threshold. An analysis of data for the d(gamma,n)p reaction and other experiments is presented. A fit to the world data analyzed in this manner gives a GDH integral value of -603 +/- 43 mu b between the photodisintegration threshold and 6 MeV. This result is the first confirmation of the large contribution of the S-1(0)(M1) transition predicted for the deuteron near photodisintegration threshold. In addition, a sum rule value of 3.75 +/- 0.18 fm(4) for gamma(0) is obtained between photodisintegration threshold and 6 MeV. This is a first indirect confirmation of the leading-order effective field theory prediction for the forward spin-polarizability of the deuteron.

引用

页数：7

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