COLD COLLISIONS OF GROUND-STATE HE-4 - GIANT S-WAVE SCATTERING CROSS-SECTIONS

被引：26
|
作者：
MESTER, JC [1 ]
MEYER, ES [1 ]
REYNOLDS, MW [1 ]
HUBER, TE [1 ]
ZHAO, Z [1 ]
FREEDMAN, B [1 ]
KIM, J [1 ]
SILVERA, IF [1 ]
机构：
[1] HARVARD UNIV,LYMAN LAB PHYS,CAMBRIDGE,MA 02138
来源：
PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.71.1343
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have measured integral elastic cross sections for ground state He-4-He-4 scattering at collision energies from 1.35 to 0.5 K using a novel atomic beam apparatus built into a dilution refrigerator. Scattering is almost pure s wave, and is predicted to be enormous due to a possibly bound state near the continuum. The effective integral cross section ranges from 200 to 1000 angstrom2 as collision energy is reduced in our experiment. These cross sections are in agreement with the values predicted using the latest analytical potential of Aziz and Slaman.
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收藏
页码：1343 / 1346
页数：4
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