Spatially resolved nuclear spin relaxation, electron spin relaxation and light absorption in swift heavy ion irradiated LiF crystals

被引：8

作者：

Stork, H. ^{[1
,2
]}

Dinse, K-P ^{[3
]}

Ditter, M. ^{[1
]}

Fujara, F. ^{[1
]}

Masierak, W. ^{[4
]}

Neumann, R. ^{[5
]}

Schuster, B. ^{[1
,5
]}

Schwartz, K. ^{[5
]}

Trautmann, C. ^{[5
]}

机构：

[1] Tech Univ Darmstadt, Inst Festkorperphys, D-64289 Darmstadt, Germany

[2] Lab Natl Champs Magnet Intenses, F-38042 Grenoble 9, France

[3] FU Berlin, Fachbereich Phys, D-14195 Berlin, Germany

[4] Uniwersytet Kazimierza Wielkiego, PL-85090 Bydgoszcz, Poland

[5] GSI Helmholtzzentrum Schwerionen Forsch, D-64291 Darmstadt, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 18期

关键词：

IONIZATION; CREATION;

D O I：

10.1088/0953-8984/22/18/185402

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Spatially resolved (19)F and (7)Li spin-lattice relaxation rates are measured for LiF single crystals after irradiation with two kinds of swift heavy ions ((12)C of 133 MeV and (208)Pb of 1.78 GeV incident energy). Like in earlier studies on (130)Xe and (238)U irradiated LiF crystals, we found a strong enhancement of the nuclear spin-lattice relaxation rate within the ion penetration depth and a slight-but still significant-enhancement beyond. By evaluating the nuclear relaxation rate enhancement within the ion range after irradiation with different projectiles, a universal relationship between the spin-lattice relaxation rate and the dose is deduced. The results of accompanying X-band electron paramagnetic resonance relaxation measurements and optical absorption spectroscopy are included in a physical interpretation of this relationship. Also the reason for the enhanced relaxation rate beyond the ion range is further discussed.

引用

页数：8

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