PROTONIUM ANNIHILATION IN P-WAVE USING LOW-DENSITY (RHO/RHO-0-APPROXIMATE-TO-10(-3)) HYDROGEN TARGETS - MEASUREMENTS OF CASCADE TIMES AND WIDTHS

被引：22

作者：

ADAMO, A

AGNELLO, M

BALESTRA, F

BELLI, G

BENDISCIOLI, G

BERTIN, A

BOCCACCIO, P

BONAZZOLA, GC

BRESSANI, T

BRUSCHI, M

BUSSA, MP

BUSSO, L

CALVO, D

CAPPONI, M

CICALO, C

CORRADINI, M

COSTA, S

DANTONE, I

DECASTRO, S

DISEP, F

FALOMKIN, IV

FAVA, L

FELICIELLO, A

FERRERO, L

FILIPPINI, V

GALLI, D

GARFAGNINI, R

GASTALDI, U

GIANOTTI, P

GRASSO, A

GUARALDO, C

IAZZI, F

LANARO, A

RIZZINI, EL

LOMBARDI, M

LUCHERINI, V

MAGGIORA, A

MARCELLO, S

MARCONI, U

MARGAGLIOTTI, GV

MARON, G

MASONI, A

MASSA, I

MINETTI, B

MORANDO, M

MONTAGNA, P

NICHITIU, F

PANZIERI, D

PAULI, G

PICCININI, M

机构：

[1] IST NAZL FIS NUCL, I-09100 CAGLIARI, ITALY

[2] IST NAZL FIS NUCL, TURIN, ITALY

[3] POLITECN TORINO, I-10125 TURIN, ITALY

[4] UNIV TURIN, IST FIS, I-10125 TURIN, ITALY

[5] UNIV BRESCIA, DIPARTIMENTO ELETTR AUTOMAZ, I-25133 BRESCIA, ITALY

[6] IST NAZL FIS NUCL, SEZ TORINO, I-25133 BRESCIA, ITALY

[7] UNIV PAVIA, DIPARTIMENTO FIS NUCL & TEOR, I-27100 PAVIA, ITALY

[8] IST NAZL FIS NUCL, I-27100 PAVIA, ITALY

[9] UNIV BOLOGNA, DIPARTIMENTO FIS, I-40100 BOLOGNA, ITALY

[10] IST NAZL FIS NUCL, BOLOGNA, ITALY

[11] IST NAZL FIS NUCL, LAB NAZL LEGNARO, I-35020 LEGNANO, ITALY

[12] JOINT INST NUCL RES DUBNA, MOSCOW 101000, USSR

[13] INST NATL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[14] CERN, PPE, CH-1211 GENEVA 23, SWITZERLAND

[15] UNIV TRIESTE, IST FIS, I-34127 TRIESTE, ITALY

[16] IST NAZL FIS NUCL, TRIESTE, ITALY

[17] UNIV PADUA, DIPARTIMENTO FIS, I-35100 PADUA, ITALY

[18] IST NAZL FIS NUCL, PADUA, ITALY

[19] UNIV FLORENCE, DIPARTIMENTO ENERGET, I-50121 FLORENCE, ITALY

[20] UNIV UDINE, IST FIS, I-33100 UDINE, ITALY

[21] IST NAZL FIS NUCL, SEZ TRIESTE, I-33100 UDINE, ITALY

来源：

PHYSICS LETTERS B | 1992年 / 285卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)91293-I

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The use of low-density hydrogen targets is demonstrated experimentally to be a new way of selecting protonium (ppBAR atom) annihilations with initial angular momentum L=1. The mean value and the width of the time distributions which occur between protonium formation and annihilation have been measured at room temperature at 8.2, 4.1, 2.1 mbar. They are (110+/-10; 45+/-5), (145+/-15; 82+/-9) and (210+/-25; 125+/-9) ns, respectively.

引用

页码：15 / 20

页数：6

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