ALPHA-RECOIL TRACKS IN MICA - REGISTRATION EFFICIENCY

被引：15

作者：

KATCOFF, S

机构：

[1] Isotope Department, Weizmann Institute of Science, Rehovot

[2] Chemistry Department, Brookhaven National Laboratory, Upton

来源：

SCIENCE | 1969年 / 166卷 / 3903期

关键词：

D O I：

10.1126/science.166.3903.382

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Recoils from alpha-particle decay of naturally occurring radioactive nuclides have energies between 70 and 169 kiloelectron volts. It is shown that these alpha recoils register tracks in mica, observable as etch pits, with an efficiency of about 80 percent. When the recoil energy is degraded to 40 kiloelectron volts the efficiency drops to 50 percent. But, since the decay of each thorium or uranium impurity atom in natural mica is followed by a cascade of six or eight alpha particles, the overall registration efficiency must be very nearly 100 percent.

引用

页码：382 / &