DETERMINATION OF THE RADIUS OF THE LI-11 NEUTRON HALO FROM PION DOUBLE CHARGE-EXCHANGE

被引：30

作者：

GIBBS, WR ^{[1
]}

HAYES, AC ^{[1
]}

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.67.1395

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have analyzed the pion-induced double-charge-exchange data for the direct population of the ground state of Li-11 by the B-11(pi-,pi+) Li-11 reaction. We find that the measured cross section determines the rms radius of the last two neutrons in Li-11 to be 5.1(-0.9)+0.6 fm, which corresponds to a total neutron rms radius for the nucleus of 3.28(-0.33)+0.24 fm. We show that for large assumed neutron-halo radii the cross section decreases as the radius of the halo to the inverse sixth power and that a radius of 12 fm leads to a cross section which is 3 orders of magnitude smaller than that measured.

引用

页码：1395 / 1398

页数：4

共 14 条

[1] ENERGY-LEVELS OF LIGHT-NUCLEI A = 11-12 [J].

AJZENBERGSELOVE, F .

NUCLEAR PHYSICS A, 1990, 506 (01) :1-158

[2] OBSERVATION OF FORWARD NEUTRONS FROM THE BREAK-UP OF THE LI-11 NEUTRON HALO [J].

ANNE, R ;

ARNELL, SE ;

BIMBOT, R ;

EMLING, H ;

GUILLEMAUDMUELLER, D ;

HANSEN, PG ;

JOHANNSEN, L ;

JONSON, B ;

LEWITOWICZ, M ;

MATTSSON, S ;

MUELLER, AC ;

NEUGART, R ;

NYMAN, G ;

POUGHEON, F ;

RICHTER, A ;

RIISAGER, K ;

SAINTLAURENT, MG ;

SCHRIEDER, G ;

SORLIN, O ;

WILHELMSEN, K .

PHYSICS LETTERS B, 1990, 250 (1-2) :19-23

[3] NUCLEAR-SPIN AND MAGNETIC-MOMENT OF LI-11 [J].

ARNOLD, E ;

BONN, J ;

GEGENWART, R ;

NEU, W ;

NEUGART, R ;

OTTEN, EW ;

ULM, G ;

WENDT, K .

PHYSICS LETTERS B, 1987, 197 (03) :311-314

[4] PION-NUCLEUS DOUBLE CHARGE-EXCHANGE AND THE NUCLEAR SHELL-MODEL [J].

AUERBACH, N ;

GIBBS, WR ;

GINOCCHIO, JN ;

KAUFMANN, WB .

PHYSICAL REVIEW C, 1988, 38 (03) :1277-1296

[5] EFFECTIVE INTERACTIONS FOR 1P SHELL [J].

COHEN, S ;

KURATH, D .

NUCLEAR PHYSICS, 1965, 73 (01) :1-&

[6] SOFT GIANT-DIPOLE MODE OF LI-11 [J].

HAYES, AC ;

STROTTMAN, D .

PHYSICAL REVIEW C, 1990, 42 (05) :2248-2251

[7] THE RELATION BETWEEN DI-NEUTRON CLUSTER MODEL AND SHELL-MODEL CONFIGURATIONS IN LI-11 [J].

HAYES, AC .

PHYSICS LETTERS B, 1991, 254 (1-2) :15-19

[8] RELATIVISTIC HEAVY-IONS MEASURE THE MOMENTUM DISTRIBUTION ON THE NUCLEAR-SURFACE [J].

HUFNER, J ;

NEMES, MC .

PHYSICAL REVIEW C, 1981, 23 (06) :2538-2547

[9]

KAUFMANN WB, 1990, SECOND LAMPF INTERNATIONAL WORKSHOP ON PION-NUCLEUS DOUBLE CHARGE EXCHANGE, P135

[10] ELECTROMAGNETIC DISSOCIATION AND SOFT GIANT-DIPOLE RESONANCE OF THE NEUTRON-DRIPLINE NUCLEUS LI-11 [J].

KOBAYASHI, T ;

SHIMOURA, S ;

TANIHATA, I ;

KATORI, K ;

MATSUTA, K ;

MINAMISONO, T ;

SUGIMOTO, K ;

MULLER, W ;

OLSON, DL ;

SYMONS, TJM ;

WIEMAN, H .

PHYSICS LETTERS B, 1989, 232 (01) :51-55

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