摘要:

Electron‐excited Auger spectroscopy, as it is presently applied, utilizes incident beam energies which are normally greater than that corresponding to the maximum ionization cross section. Preliminary measurements indicate that Auger emission at these high primary energies is significantly enhanced due to excitation by internal secondary electrons. This creates a serious problem with respect to the use of Auger spectroscopy as an analytical tool.

ISSN:0003-6951    

DOI:10.1063/1.1652685

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

We have observed tunable four‐photon optical parametric noise in calcite with aQ‐switched rubylaser pump. The observed radiation corresponds to the spontaneous emission from a phase‐matched parametric system satisfying the relations: (1a) &ohgr;(ruby) + &ohgr;(ruby) = &ohgr;1+ &ohgr;2and (1b)k0(ruby) + k0(ruby) = k1&egr;+ k20, where &ohgr; andkdenote the angular frequency and wavevector, respectively. The superscriptsoand &egr; denote ordinary and extraordinary rays, respectively. The optical signal was tuned from 4300 to 5860 Å by adjusting the orientation of the calcite; this signal was detected by an RCA 7265 photomultiplier. Although no direct detection of the infrared signal was attempted, we would expect it to be tuned over the range from 0.843 to 1.80 &mgr;. From experimental data, the estimated noise power in the high‐frequency optical signal was about 0.5 &mgr;W.

ISSN:0003-6951    

DOI:10.1063/1.1652686

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

Hyperfine components of theR(127) line of the 11–5 band of molecular iodine at 633 nm have been observed by saturating the absorption inside the cavity of a single‐frequency He&sngbnd;Ne laser. The component widths of 4.5 MHz were broadened a factor of 2 by 1‐Torr iodine pressure, or by 500‐G magnetic field. Since no wavelength shift as large as 2 MHz was observed, wavelength perturbations from these sources should be controllable to less than 2 × 10−13&lgr;. The use of one of these components as a reference for laser stabilization is suggested.

ISSN:0003-6951    

DOI:10.1063/1.1652687

出版商:AIP    

年代:1969

数据来源: AIP