摘要:

Backscattering of 3.0‐MeV4He ions has been used to investigate the low‐temperature migration of Cr into and through thin Au films (1000 and 2000 Å) deposited by evaporation and sputtering. Significant Cr migration is seen at annealing temperatures of 250 and 450 °C for periods of 0.5–22 h, whereas no migration of Cr in the Au was detected in any of the as‐deposited samples or after a 150 °C 0.5‐h anneal.

ISSN:0003-6951    

DOI:10.1063/1.1654210

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

Polishing of sapphire surfaces with energetic Ar+ion beams is shown to result in a substantial increase in laser damage threshold over that for conventionally polished surfaces. Data for both entrance and exit damage are presented. The results are interpreted in terms of an increase in surface strength with ion beam polishing.

ISSN:0003-6951    

DOI:10.1063/1.1654211

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

The first observation is reported of laser oscillation in pure rotational transitions of the OH and OD free radicals. 44 lines in OH and 17 lines in OD have been seen in the 12‐ to 20‐&mgr; region. Transitions were observed within thev=0, 1, 2 vibrational levels of OH and thev=0 vibrational level of OD. Accurate values are calculated for theBandDrotational constants for OD and higher‐order rotational constants for OH.

ISSN:0003-6951    

DOI:10.1063/1.1654212

出版商:AIP    

年代:1972

数据来源: AIP