TY - JOUR
T1 - A remarkable increase of positron annihilation rate in supercritical fluid xenon
AU - Sumi, Tomonari
AU - Sekino, Hideo
N1 - Funding Information:
This work was partly supported by Grant-in-Aid for Science Research from Ministry of Education, Science and Culture (No. 15310105). We are grateful to Dr. Y. Watanabe for providing us a numerical table of the xenon electron density distribution determined from a Dirac–Fock–Roothaan method.
PY - 2005/5/27
Y1 - 2005/5/27
N2 - An anomalous increase of positron annihilation rare caused by a decrease of the temperature has been observed in supercritical fluid 4He along isochors by an experiment. By using a molecular simulation, we demonstrate the similar increase in supercritical fluid xenon at the temperature that is far away from the liquid-vapor phase transition. The phenomenon can be interpreted as a sudden clustering of xenon atom that is induced by a self-trapping of the positron.
AB - An anomalous increase of positron annihilation rare caused by a decrease of the temperature has been observed in supercritical fluid 4He along isochors by an experiment. By using a molecular simulation, we demonstrate the similar increase in supercritical fluid xenon at the temperature that is far away from the liquid-vapor phase transition. The phenomenon can be interpreted as a sudden clustering of xenon atom that is induced by a self-trapping of the positron.
UR - http://www.scopus.com/inward/record.url?scp=18244390704&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18244390704&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2005.03.106
DO - 10.1016/j.cplett.2005.03.106
M3 - Article
AN - SCOPUS:18244390704
SN - 0009-2614
VL - 407
SP - 294
EP - 297
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -