RADIOACTIVE CHARGE CARRIERS IN LIQUID HELIUM CREATED FROM FAST NUCLEARBEAMS

Fizika B (Zagreb)

NORIAKI TAKAHASHI¹ 

关键词: snowballs;    radiation detection method;    radioactive nuclear beams;    liquid 4He;   

DOI  :  

学科分类：物理（综合）

来源: Fizika B: a journal of experimental and theoretical physics

【 摘 要 】

An ionic positive charge in superfluid helium exists in the form of an aggregate ofhelium atoms around a core ion and is called a "snowball". Positively chargedimpurities were created through injection of fast nuclear beams into liquid helium. Thetransport of positive charges in liquid helium was traced through the measurements ofelectric currents and of radioactive decays of the impurity ions. Applied electric fieldsof both directions controlled the movements of impurity ions unambiguously. Productionrates of snowballs and of neutrals from the injection of nuclear beams have beenestimated. The rates change differently for various ions used, not only with temperatureof the liquid helium but also with spatial density of the incident fast beams.

【 授权许可】

Unknown