Thirty-minute coherence in free induction decay signals in superfluid 3He-B

被引：16

作者：

Fisher, SN ^{[1
]}

Guénault, AM ^{[1
]}

Hale, AJ ^{[1
]}

Pickett, GR ^{[1
]}

Reeves, PA ^{[1
]}

Tvalashvili, G ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2000年 / 121卷 / 5-6期

关键词：

D O I：

10.1023/A:1017520806966

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The persistent induction signal (PIS) is an extremely long lived NMR mode in, the B-phase of superfluid He-3. The first signals observed lived for zip to 25s following a moderate NMR tipping pulse, but were found to be highly irreproducible. Here we present new measurements obtained in, a smooth sapphire cell designed to achieve the lowest possible temperatures. The signals observed in this cell are quite reproducible but are only excited over a restricted range of magnetic field gradients. The free induction signals exceed 30 minutes at the lowest temperatures.

引用

页码：303 / 308

页数：6

共 7 条

[1]

BOROVIKROMANOV AS, 1984, JETP LETT, V40, P256

[2] NEW METHODS FOR NUCLEAR COOLING INTO THE MICROKELVIN REGIME [J].