Kaonic nitrogen X-ray transition yields in a gaseous target

被引：45

作者：

Ishiwatari, T

Beer, G

Bragadireanu, AM

Cargnelli, M

Curceanu, C

Egger, JP

Fuhrmann, H

Guaraldo, C

Kienle, P

Koike, T

Iliescu, M

Itahashi, K

Iwasaki, M

Lauss, B

Lucherini, V

Ludhova, L

Marton, J

Mulhauser, E

Ponta, T

Schaller, LA

Seki, R

Sirghi, DL

Sirghi, F

Strasser, P

Zmeskal, J

机构：

[1] Inst Medium Energy Phys, A-1090 Vienna, Austria

[2] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada

[3] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[4] RIKEN, Wako Inst, Wako, Saitama 3510198, Japan

[5] Inst Phys & Nucl Engn Horia Hulubei, Particle Phys Dept, R-76900 Bucharest, Romania

[6] Univ Fribourg, Inst Phys, CH-1700 Fribourg, Switzerland

[7] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland

[8] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[9] CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA

[10] Calif State Univ Northridge, Dept Phys & Astrophys, Northridge, CA 91330 USA

来源：

PHYSICS LETTERS B | 2004年 / 593卷

关键词：

kaonic nitrogen yields; K-shell electron population; charged kaon mass;

D O I：

10.1016/j.physletb.2004.04.055

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The first measurement of the yields of three kaonic nitrogen X-ray transitions, using the DEAR (DAPhiNE Exotic Atom Research) setup at the DAPhiNE collider of Frascati, is reported. The yields are 41.5 +/- 8.7(stat.) 4.1(sys.)% for the n = 7 --> 6 transition, 55.0 +/- 3.9(stat.) +/-5.5(sys.)% for the n = 6 --> 5 transition and 57.4 +/- 15.2(stat.) +/- 5.7(sys.)% for the n = 5 --> 4 transition at a density rho = 3.4rho(NTP). By using the experimental yields in an atomic cascade calculation, a 1 to 3% K-shell electron population in the n = 6 level was deduced. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：48 / 54

页数：7

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