INTENSE POSITRON SOURCES BY PAIR CREATION WITH NEUTRON-CAPTURE GAMMA-RAYS

被引：32

作者：

KRUSCHE, B

SCHRECKENBACH, K

机构：

[1] Institut Laue-Langevin

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1990年 / 295卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(90)90435-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An intense source of positrons in the MeV range is described. The positrons were produced by pair production of high energy prompt γ-rays from neutron capture reactions. The source consisted of layers of titanium and platinum and it was placed in the high thermal neutron flux (3.3 × 1014 n/cm2s) at the BILL beta spectrometer of the High Flux Reactor, Grenoble. The beta spectrometer served as a tunable monochromator. The system yielded 2.5 × 106 e+/s in 10 cm of the focal plane, with a momentum dispersion of Δp/p = 1.5 × 10-3 cm-1. A model for the numerical simulation of this positron production method was developed and the data are compared with the calculated spectra. A future application of the present positron production technique is presented, using the layers of cadmium and tungsten to produce a beam of moderated positrons. © 1990.

引用

页码：155 / 171

页数：17

共 27 条

[1]

[Anonymous], 1954, QUANTUM THEORY RAD

[2]

Azuelos G., 1976, Atomic Data and Nuclear Data Tables, V17, P103, DOI 10.1016/0092-640X(76)90003-6

[3]

BOKEMEYER H, 1987, NATO ASI B, V153, P195

[4] A DETERMINATION OF POSITRON MOBILITIES IN LOW-DENSITY GASES [J].

CHARLTON, M .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1985, 18 (18) :L667-L671

[5] PRECISE CONVERSION ELECTRON INTENSITIES OF EU-152 DECAY FOR DETECTOR CALIBRATION PURPOSES [J].

COLVIN, GG ;

SCHRECKENBACH, K .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1985, 228 (2-3) :365-368

[6]

COWAN T, 1987, NASI SERIES B, V153, P111

[7]

DORIKENSVANPRAE.L, 1988, POSITRON ANNIHILATIO

[8] THE SLOW POSITRON SOURCE AT THE GIESSEN 65 MEV LINAC [J].

EBEL, F ;

FAUST, W ;

HAHN, C ;

LANGER, S ;

RUCKERT, M ;

SCHNEIDER, H ;

SINGE, A ;

TOBEHN, I .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1988, 272 (03) :626-628

[9] POSITRON LIFETIME SPECTRA FOR GASES [J].

HEYLAND, GR ;

CHARLTON, M ;

GRIFFITH, TC ;

WRIGHT, GL .

CANADIAN JOURNAL OF PHYSICS, 1982, 60 (04) :503-516

[10]

HUMBERSTONE JAW, 1987, NATO ADV STUDIES I B, V169

← 1 2 3 →