Laser resonance studies of the interactions of metastable antiprotonic helium atomcules (p)over-bar(4)He(+) with surrounding H-2 molecules

被引：24

作者：

Yamazaki, T

Ketzer, B

Widmann, E

Eades, J

Daniel, H

Hartmann, FJ

Hasinoff, M

Pohl, R

Schmidt, R

vonEgidy, T

Horvath, D

Kumakura, M

Morita, N

Sugai, I

Fujita, Y

Torii, HA

Hori, M

Ishikawa, T

Maas, FE

Tamura, H

Hayano, RS

机构：

[1] KFKI, INST NUCL & PARTICLE PHYS, H-1525 BUDAPEST, HUNGARY

[2] INST MOL SCI, OKAZAKI, AICHI 444, JAPAN

[3] UNIV TOKYO, INST NUCL STUDY, TANASHI, TOKYO 188, JAPAN

[4] UNIV TOKYO, DEPT PHYS, BUNKYO KU, TOKYO 113, JAPAN

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 265卷 / 1-2期

基金：

日本学术振兴会; 匈牙利科学研究基金会;

关键词：

D O I：

10.1016/S0009-2614(96)01398-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules <(p)over bar He+> with surrounding H-2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H-2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at I bar and 30 K is (2.4+/-1.0) x 10(-15) cm(2), a factor of 24 larger than that for the lower (37,34) state. (C) 1997 Elsevier Science B.V. All rights reserved.

引用

页码：137 / 144

页数：8

共 27 条

[21] Effects of impurity atoms and molecules on the lifetime of antiprotonic helium atoms [J].

Widmann, E ;

Sugai, I ;

Yamazaki, T ;

Hayano, RS ;

Iwasaki, M ;

Nakamura, SN ;

Tamura, H ;

Ito, TM ;

Kawachi, A ;

Nishida, N ;

Higemoto, W ;

Ito, Y ;

Morita, N ;

Hartmann, FJ ;

Daniel, H ;

vonEgidy, T ;

Schmid, W ;

Hoffmann, J ;

Eades, J .

PHYSICAL REVIEW A, 1996, 53 (05) :3129-3139

[22] PHASE AND DENSITY-DEPENDENCE OF THE DELAYED ANNIHILATION OF METASTABLE ANTIPROTONIC HELIUM-ATOMS IN GAS, LIQUID, AND SOLID HELIUM [J].

WIDMANN, E ;

SUGAI, I ;

YAMAZAKI, T ;

HAYANO, RS ;

IWASAKI, M ;

NAKAMURA, SN ;

TAMURA, H ;

ITO, TM ;

KAWACHI, A ;

NISHIDA, N ;

HIGEMOTO, W ;

ITO, Y ;

MORITA, N ;

HARTMANN, FJ ;

DANIEL, H ;

VONEGIDY, T ;

SCHMID, W ;

HOFFMANN, J ;

EADES, J .

PHYSICAL REVIEW A, 1995, 51 (04) :2870-2880

[23]

WIDMANN E, 1995, COMMUNICATION

[24] ATOMIC CORE-POLARIZATION EFFECTS IN METASTABLE HADRONIC HELIUM-ATOMS [J].

YAMAZAKI, T ;

OHTSUKI, K .

PHYSICAL REVIEW A, 1992, 45 (11) :7782-7786

[25] FORMATION OF LONG-LIVED GAS-PHASE ANTIPROTONIC HELIUM-ATOMS AND QUENCHING BY H-2 [J].

YAMAZAKI, T ;

WIDMANN, E ;

HAYANO, RS ;

IWASAKI, M ;

NAKAMURA, SN ;

SHIGAKI, K ;

HARTMANN, FJ ;

DANIEL, H ;

VONEGIDY, T ;

HOFMANN, P ;

KIM, YS ;

EADES, J .

NATURE, 1993, 361 (6409) :238-240

[26]

YAMAZAKI T, UNPUB PHYS REV LETT

[27]

ADV CHEM PHYS

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