LIFE TIME OF SOFT MULTIPOLE EXCITATIONS

被引：51

作者：

SAGAWA, H

VANGIAI, N

TAKIGAWA, N

ISHIHARA, M

YAZAKI, K

机构：

[1] UNIV PARIS 11, INST PHYS NUCL, F-91406 ORSAY, FRANCE

[2] TOHOKU UNIV, FAC SCI, DEPT PHYS, AOBA KU, SENDAI, MIYAGI 980, JAPAN

[3] UNIV TOKYO, FAC SCI, DEPT PHYS, BUNKYO KU, TOKYO 113, JAPAN

来源：

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI | 1995年 / 351卷 / 04期

关键词：

D O I：

10.1007/BF01291143

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：

Decay of soft multipole excitations in halo nuclei is studied in comparison with the potential resonance state. Although the soft excitation has a sharp peak just above the particle threshold and carries extremely large transition strength, the decay rate looks much faster than that expected for a resonance state. Consequently, the half life is shown to be several orders of magnitude shorter than what one naively expects from the uncertainty principle. It is shown also that the soft excitations accumulate large transition strength as a non-resonant single-particle excitation, but not as particle-hole collective excitations like giant resonances.

引用

页码：385 / 389

页数：5

共 13 条

[1]

Hansen P.G., Jonson B., The Neutron Halo of Extremely Neutron-Rich Nuclei, Europhysics Letters (EPL), 4, (1987)

[2]

Bertsch G.F., Esbensen H., Ann. of Phys., 209, (1991)

[3]

Sagawa H., Multipole resonances in halo nuclei, Nuclear Physics A, 538 A, (1992)

[4]

Fayans S.A., Phys. Lett., 267 B, (1991)

[5]

Ieki K., Sackett D., Galonsky A., Bertulani C.A., Kruse J.J., Lynch W.G., Morrissey D.J., Orr N.A., Schulz H., Sustich A., Wigner J.A., Deak F., Horvath A., Kiss A., Seres Z., Kolata J.J., Wigner A.E., Humphrey D.L., Phys. Rev. Lett., 70, (1993)

[6]

Nakamura T., Et al., Phys. Lett., 331 B, (1994)

[7]

Sagawa H., Takigawa N., Van Giai N., Nucl. Phys., 543 A, (1992)

[8]

Alhassid Y., Gai M., Bertsch G.F., Phys. Rev. Lett., 49, (1982)

[9]

Blatt J.M., Weisskopf V.F., Theoretical Nuclear Physics, (1952)

[10]

Takigawa N., Sagawa H., Phys. Lett., 265 B, (1991)

← 1 2 →