First evidence for spin-flip M1 strength in 40Ar

被引：23

作者：

Li, T. C. ^{[1
]}

Pietralla, N.

Tonchev, A. P.

Ahmed, M. W.

Ahn, T.

Angell, C.

Blackston, M. A.

Costin, A.

Keeter, K. J.

Li, J.

Lisetskiy, A.

Mikhailov, S.

Parpottas, Y.

Perdue, B. A.

Rainovski, G.

Tornow, W.

Weller, H. R.

Wu, Y. K.

机构：

[1] SUNY Stony Brook, Nucl Struct Lab, Stony Brook, NY 11794 USA

[2] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[3] Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27705 USA

[4] Univ N Carolina, Triangle Univ Nucl Lab, Chapel Hill, NC 27599 USA

[5] Idaho State Univ, Dept Phys, Pocatello, ID 83209 USA

[6] Duke Univ, Free Elect Laser Lab, Durham, NC 27708 USA

[7] Michigan State Univ, Natl Supercond Cyclotron Lab, E Lansing, MI 48824 USA

来源：

PHYSICAL REVIEW C | 2006年 / 73卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.73.054306

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 Ar-40(gamma ->,gamma(')) photon scattering reaction was used to search for spin-flip M1 strength in Ar-40. The nearly monochromatic, linearly polarized photon beam of HI gamma S, in an energy region from 7.7 to 11 MeV, was employed in this study. 28 dipole excitations were observed. The azimuthal intensity asymmetry indicated that all of these states were E1 except for the state at E-x=9.757 MeV. Shell-model calculations were used to interpret this state as one fragment of the spin-flip M1 strength in Ar-40.

引用

页数：7

共 28 条

[1] ENERGY-LEVELS OF LIGHT-NUCLEI A=13-15 [J].

AJZENBERGSELOVE, F .

NUCLEAR PHYSICS A, 1991, 523 (01) :1-196

[2] The nuclear shell model towards the drip lines [J].

Brown, B. A. .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 47, 2001, 47 (02) :517-599

[3] Nuclear data sheets for A=40 [J].

Cameron, JA ;

Singh, B .

NUCLEAR DATA SHEETS, 2004, 102 (02) :293-513

[4] The shell model as a unified view of nuclear structure [J].

Caurier, E ;

Martínez-Pinedo, G ;

Nowacki, F ;

Poves, A ;

Zuker, AP .

REVIEWS OF MODERN PHYSICS, 2005, 77 (02) :427-488

[5] THE REACTION S-36(ALPHA, GAMMA)AR-40 - GAMMA-TRANSITION PROPERTIES OF RESONANCE AND BOUND-STATES IN AR-40 [J].

CSEH, J ;

JOZSA, M ;

KISS, AZ ;

KOLTAY, E ;

SOMORJAI, E ;

KEINONEN, J ;

TIKKANEN, P .

NUCLEAR PHYSICS A, 1988, 489 (02) :225-236

[6] Supplement to energy levels of A=21-44 nuclei (VII) [J].

Endt, PM .

NUCLEAR PHYSICS A, 1998, 633 (01) :1-+

[7] ENERGY-LEVELS OF A = 21-44 NUCLEI (VII) [J].

ENDT, PM .

NUCLEAR PHYSICS A, 1990, 521 :1-830

[8] POLARIZATION MEASUREMENTS ON NUCLEAR GAMMA-RAYS [J].

FAGG, LW ;

HANNA, SS .

REVIEWS OF MODERN PHYSICS, 1959, 31 (03) :711-758

[9] ELECTROEXCITATION OF LOW-MULTIPOLARITY MAGNETIC TRANSITIONS IN AR-36 AND AR-38 [J].

FOLTZ, CW ;

SOBER, DI ;

FAGG, LW ;

GRAF, HD ;

RICHTER, A ;

SPAMER, E ;

BROWN, BA .

PHYSICAL REVIEW C, 1994, 49 (03) :1359-1371

[10] 'Magic' nucleus 42Si [J].

Fridmann, J ;

Wiedenhöver, I ;

Gade, A ;

Baby, LT ;

Bazin, D ;

Brown, BA ;

Campbell, CM ;

Cook, JM ;

Cottle, PD ;

Diffenderfer, E ;

Dinca, DC ;

Glasmacher, T ;

Hansen, PG ;

Kemper, KW ;

Lecouey, JL ;

Mueller, WF ;

Olliver, H ;

Rodriguez-Vieitez, E ;

Terry, JR ;

Tostevin, JA ;

Yoneda, K .

NATURE, 2005, 435 (7044) :922-924

← 1 2 3 →