A possible mechanism for anomalous pulses observed in sodium iodide crystals

被引：21

作者：

Smith, NJT ^{[1
]}

Lewin, JD ^{[1
]}

Smith, PF ^{[1
]}

机构：

[1] Rutherford Appleton Lab, Particle Phys Dept, Chilton OX11 0QX, Oxon, England

来源：

PHYSICS LETTERS B | 2000年 / 485卷 / 1-3期

关键词：

D O I：

10.1016/S0370-2693(00)00640-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Low energy pulses with anomalously low time constant have been observed recently in sodium iodide crystals. A model is presented based on partial energy deposits from alpha particles passing out of the crystal from a thin contaminated layer, which would generate events of similar characteristic. The predicted 1/E-2 form of the spectrum is consistent with observation. The required level of contamination is estimated both for U/Th impurities and for radon decay products but is found to be higher than would be expected from the crystal fabrication process and history. Possible experimental tests of the model are suggested. (C) 2000 Published by Elsevier Science B.V.

引用

页码：9 / 15

页数：7

共 16 条

[1]

[Anonymous], NUCLEONICS

[2]

Bernabei R, 1998, NUCL PHYS B-PROC SUP, V66, P222

[3] A MULTITON LOW ACTIVITY NAI(TL) DETECTOR FOR UNDERGROUND PHYSICS [J].

BERNABEI, R ;

BELLI, P ;

DINICOLANTONIO, W ;

LANDONI, V ;

INCICCHITTI, A ;

PROSPERI, D ;

ARPESELLA, C ;

JIANG, DC ;

LINKAI, D ;

HAOHUAI, K .

ASTROPARTICLE PHYSICS, 1995, 4 (01) :45-54

[4] PULSE SHAPE-DISCRIMINATION WITH A LARGE NAI CRYSTAL [J].

DOLL, P ;

FINK, G ;

HAUPENTHAL, M ;

FINLAY, RW ;

HAUBER, S ;

KLAGES, HO ;

SCHIELER, H ;

SMEND, F ;

WICKE, GD .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1989, 285 (03) :464-468

[5] Pulse shape discrimination and dark matter search with NaI(Tl) scintillator [J].

Gerbier, G ;

Mallet, J ;

Mosca, L ;

Tao, C ;

Chambon, B ;

Chazal, V ;

De Jésus, M ;

Drain, D ;

Messous, Y ;

Pastor, C .

ASTROPARTICLE PHYSICS, 1999, 11 (03) :287-302

[6]

GERBIER G, 1990, P 25 RENC MOR, P469

[7]

Knoll G.F., 1979, RAD DETECTION MEASUR

[8] Characteristics of alpha, gamma and nuclear recoil pulses from NaI(Tl) at 10-100 keV relevant to dark matter searches [J].

Kudryavtsev, VA ;

Lehner, MJ ;

Peak, CD ;

Lawson, TB ;

Lightfoot, PK ;

McMillan, JE ;

Roberts, JW ;

Spooner, NJC ;

Tovey, DR ;

Ward, CK ;

Smith, PF ;

Smith, NJT .

PHYSICS LETTERS B, 1999, 452 (1-2) :167-172

[9]

LEWIN JD, 1977, LR77126A

[10] SCINTILLATION RESPONSE OF ACTIVATED INORGANIC CRYSTALS TO VARIOUS CHARGED PARTICLES [J].

MURRAY, RB ;

MEYER, A .

PHYSICAL REVIEW, 1961, 122 (03) :815-&

← 1 2 →