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564. Photodesorption
Classified abstracts 543--564 cold substrate. In this w a y they a c c o u n t for the fact t h a t d e u t e r i u m c o n d e n s i n g at 4 . 2 ° K h a s the s a m e s t r u c t u r e as p r o t i u m a n d d e u t e r i u m c o n d e n s i n g at 1.8°K, whilst p r o t i u m c o n d e n s i n g at 4 . 2 ° K h a s a different structure. A S Bulatov et al, Zh Teckn Fiz, 7 (3), 1965, 852-857, (in Russian). 17 543. Decomposition pressure of TcZn6. ( U S A ) E Veleckis and I Johnson, J Phys Chem, 68, M a y 1964, 1257-1258. 17 544. Flash evaporation. (USA) H Saltsburg, J Chem Phys, 42 (4), Feb 1965, 1303-1309. 17 : 16 545. Isotopic mixing in CO chemisorbed on tungsten: a kinetic study.
( USA ) T E M a d e y et al, J Chem Phys, 42 (4), Feb 1965, 1372 1378.
18:40 554. Relative intensities of Lyman-Birge-Hopfield bands in electron impact spectrumofnitrogen. (USA) E N Lessettre et ai, J ChemPhys, 42 (2), Jan 1965, 807-809. 18 555. Effect of translational energy on ion-molecule reaction rates I. (USA) K R Ryan and J H Fatrell, J Chem Phys, 42 (3), Feb 1965, 824 829. 18:40 556. Conversion of ion types in nitrogen. ( U S A ) Shien-Biau Woo, J ChemPhys, 42 (4), Feb 1965, 125l 1261. 18:40:33 557. Study of collision effects between the constituents of a mixture of helium and nitrogen gases when excited by a 10 keV electron beam. ( U S A ) D J Sebacher, J Chem Phys, 42 (4), Feb 1965, 1368 1372.
18. Gaseous electronics 18 : 37 546. A master set of ion sources for mass spectrometers. ( U S S R ) A m a s t e r set of ion sources for a m a s s s p e c t r o m e t e r c o m p r i s i n g five possible modifications with a single optical s y s t e m was developed by t h e a u t h o r s . T h e set comprise~ : (1) A gas source with electrostatic f o c u s s i n g on the electron b e a m ; (2) A s a b o v e b u t with m a g n e t i c focussing; (3) Crucible source for solids; (4) Cell source for solids; (5) T e m p e r a t u r e stabilized source for analysis of h e a v y o r g a n i c c o m p o u n d s . T h e c o m p o n e n t s are designed to be interc h a n g e a b l e a n d s o u r c e s c a n be modified w i t h o u t h a v i n g to introduce a d d i t i o n a l elements. T h e m a x i m u m ion c u r r e n t r a n g e s f r o m 2 - 5 10 -9 A~ a n d the electron energy f r o m 5-100 eV. T h e m a x i m u m a m o u n t o f solid material that c a n be analysed is 10 -3 g m (crucible) a n d 10 ~ g m (cell). M a x i m u m t e m p e r a t u r e 1500°C. V K Oleinik et al, Pribory i Tekh Eksper, (1), 1965, 141-146, (in Russian). 18 : 2l 547. Effective pumping rate of an electronic discharge pump. ( U S A ) D e p e n d i n g o n t h e intensity o f the m a g n e t i c field a n d t h e applied a n o d e voltage, a n electronic discharge p u m p of the P e n n i n g - t y p e c o m p r i s i n g a cylindrical a n o d e a n d two fiat c a t h o d e s will have a p u m p i n g speed o f 0.5 to 2 1./sec. By a r r a n g i n g a large n u m b e r of s u c h p u m p s in parallel, p u m p i n g speeds as h i g h as 5000 1./see can be obtained. T h e a u t h o r h a s d e t e r m i n e d t h e effective p u m p i n g speed o f s u c h a n a s s e m b l y u n d e r the following a s s u m p t i o n s : (1) P u m p i n g speed i n d e p e n d e n t o f the pressure. (2) Internal gas p a s s a g e s are restricted c o m p a r e d with p u m p inlet. (3) T h e p r e s s u r e g r a d i e n t in the a s s e m b l y is uni-directional. W i t h a n a r r a y consisting o f k cells in a vertical a n d n cells in a h o r i z o n t a l row. T h e effective p u m p i n g speed S is given by S -- knsF, where s = p u m p i n g speed o f a single cell, F = Efficiency coefficient ( < l). It a p p e a r s that in o r d e r to o b t a i n a large value for F, n m u s t be as small as possible. G A Vasilev, Pribory i Tekh Eksper, (1), 1965, 147--149, (hi Russian). 18 548. Fragment ions from CH3CHO and (CHz)2CO by electron impact. ( U S A ) F H D o r m a n , J Chem Phys, 42 (1), Jan 1965, 65-68. 18:22 549. Observation of the products of ionic collision processes and ion decomposition in a linear pulsed time-of-flight spectrometer. ( U S A ) R E Ferguson et al, J Chem Phys, 42 (1), Jan 1965, 100-106. 18 550. Electron-impact spectra. ( U S A ) A Skerbele and E N Lessettre, J Chem Phys, 42 (1), Jan 1965, 395-401. 18:40 551. Excitation of methane, ethane, ethylene, propylene, acetylene, propyne and 1-butyne by low-energy electron beams. ( U S A ) C R Bowman and W D Miller, J Chem Phys, 42 (2), Jan 1965, 681-686. 18:40 552. Ionization and excitation of argon with alpha particles. ( U S A ) G S H u r s t et al, J Chem Phys, 42 (2), Jan 1965, 713-719. 18:40 553. Reactions of 12-135 eV H~ + ions with A t . ( U S A ) M G M e n e n d e z et ai, J Chem Phys, 42 (2), Jan 1965, 802-803.
326
19. Radiation 19 Measurement of oxygen adsorption on silicon by ellipsometry. See a b s t r a c t n u m b e r 529. 19 Laser-heated cathode. See abstract n u m b e r 591. 19 558. A new method of frequency tuning of a molecular generator by control of the vacuum in the generator casing. (USSR) E x p e r i m e n t a l results s h o w t h a t t h e m o l e c u l a r g e n e r a t o r f r e q u e n c y varies linearily with pressure up to 10 -5 torr. A t h i g h e r p r e s s u r e s the relationship is given by: d fdpc /s = A(p) ( f c /s-- f A). Where f c /s = g e n e r a t o r f r e q u e n c y in Hertz; f A = f r e q u e n c y c o r r e s p o n d i n g to the apex o f the e m i s s i o n line; p pressure in v a c u u m c h a m b e r ; A = constant. G M Strakhovskii and V M Tatarenkov, Proc Higher Ed Schools
"'Radiophysics", 7 (5), 1964, 992 994, (in Russian). 19:54 559. L a s e r s in medicine. (Great Britain) A report of a m e e t i n g a r r a n g e d jointly by the Electronics Division o f the I E E a n d the Medical a n d Biological G r o u p of t h e I E R E . T h e report deals largely with o p t h a l m o l o g y , for e x a m p l e in the welding of detached retinas a n d in m e a s u r i n g the resolution of the reti n a. R Brown, Electronic Equipment News, 6, Jan 1965, 40 44. 19 560. Optical coefficients of thin chromium films prepared by evaporation in a vacuum. ( U S A ) E F Idczak, Optics and Spectroscopy, 17 (6), Dec 1964, 501-503. 19 561. Effect of F-band illumination on the X-ray luminescence of alkali-halide phosphors. ( U S A ) N D M a k s i m o v a , Opt Soc Amer, 22 (5), Jan 1964, 426-427. 19 562. Infrared filters of evaporated gallium arsenide. ( U S A ) R P Howson, Opt Soc Amer, 55 (3), July 1964, 271-275. 19 563. Optical and photoelectric properties of thin metallic films in the vacuum ultraviolet. (USA) O m P Rustgi and G L Weissler, Opt Soc Amer, 55 (4), April 1965,
456. 19 : 16 564. Photodesorption. ( U S A ) R O Adams and E E Donaldson, J Chem Phys, 42 (2), Jan 1965,
770-774.
II. V a c u u m apparatus and auxiliaries 21. Pumps and pump fluids 21
Plasma vacuum pumps. See abstract n u m b e r 512. 21
Cryopumping. See abstract n u m b e r 513.
( USA ) T E M a d e y et al, J Chem Phys, 42 (4), Feb 1965, 1372 1378.
18:40 554. Relative intensities of Lyman-Birge-Hopfield bands in electron impact spectrumofnitrogen. (USA) E N Lessettre et ai, J ChemPhys, 42 (2), Jan 1965, 807-809. 18 555. Effect of translational energy on ion-molecule reaction rates I. (USA) K R Ryan and J H Fatrell, J Chem Phys, 42 (3), Feb 1965, 824 829. 18:40 556. Conversion of ion types in nitrogen. ( U S A ) Shien-Biau Woo, J ChemPhys, 42 (4), Feb 1965, 125l 1261. 18:40:33 557. Study of collision effects between the constituents of a mixture of helium and nitrogen gases when excited by a 10 keV electron beam. ( U S A ) D J Sebacher, J Chem Phys, 42 (4), Feb 1965, 1368 1372.
18. Gaseous electronics 18 : 37 546. A master set of ion sources for mass spectrometers. ( U S S R ) A m a s t e r set of ion sources for a m a s s s p e c t r o m e t e r c o m p r i s i n g five possible modifications with a single optical s y s t e m was developed by t h e a u t h o r s . T h e set comprise~ : (1) A gas source with electrostatic f o c u s s i n g on the electron b e a m ; (2) A s a b o v e b u t with m a g n e t i c focussing; (3) Crucible source for solids; (4) Cell source for solids; (5) T e m p e r a t u r e stabilized source for analysis of h e a v y o r g a n i c c o m p o u n d s . T h e c o m p o n e n t s are designed to be interc h a n g e a b l e a n d s o u r c e s c a n be modified w i t h o u t h a v i n g to introduce a d d i t i o n a l elements. T h e m a x i m u m ion c u r r e n t r a n g e s f r o m 2 - 5 10 -9 A~ a n d the electron energy f r o m 5-100 eV. T h e m a x i m u m a m o u n t o f solid material that c a n be analysed is 10 -3 g m (crucible) a n d 10 ~ g m (cell). M a x i m u m t e m p e r a t u r e 1500°C. V K Oleinik et al, Pribory i Tekh Eksper, (1), 1965, 141-146, (in Russian). 18 : 2l 547. Effective pumping rate of an electronic discharge pump. ( U S A ) D e p e n d i n g o n t h e intensity o f the m a g n e t i c field a n d t h e applied a n o d e voltage, a n electronic discharge p u m p of the P e n n i n g - t y p e c o m p r i s i n g a cylindrical a n o d e a n d two fiat c a t h o d e s will have a p u m p i n g speed o f 0.5 to 2 1./sec. By a r r a n g i n g a large n u m b e r of s u c h p u m p s in parallel, p u m p i n g speeds as h i g h as 5000 1./see can be obtained. T h e a u t h o r h a s d e t e r m i n e d t h e effective p u m p i n g speed o f s u c h a n a s s e m b l y u n d e r the following a s s u m p t i o n s : (1) P u m p i n g speed i n d e p e n d e n t o f the pressure. (2) Internal gas p a s s a g e s are restricted c o m p a r e d with p u m p inlet. (3) T h e p r e s s u r e g r a d i e n t in the a s s e m b l y is uni-directional. W i t h a n a r r a y consisting o f k cells in a vertical a n d n cells in a h o r i z o n t a l row. T h e effective p u m p i n g speed S is given by S -- knsF, where s = p u m p i n g speed o f a single cell, F = Efficiency coefficient ( < l). It a p p e a r s that in o r d e r to o b t a i n a large value for F, n m u s t be as small as possible. G A Vasilev, Pribory i Tekh Eksper, (1), 1965, 147--149, (hi Russian). 18 548. Fragment ions from CH3CHO and (CHz)2CO by electron impact. ( U S A ) F H D o r m a n , J Chem Phys, 42 (1), Jan 1965, 65-68. 18:22 549. Observation of the products of ionic collision processes and ion decomposition in a linear pulsed time-of-flight spectrometer. ( U S A ) R E Ferguson et al, J Chem Phys, 42 (1), Jan 1965, 100-106. 18 550. Electron-impact spectra. ( U S A ) A Skerbele and E N Lessettre, J Chem Phys, 42 (1), Jan 1965, 395-401. 18:40 551. Excitation of methane, ethane, ethylene, propylene, acetylene, propyne and 1-butyne by low-energy electron beams. ( U S A ) C R Bowman and W D Miller, J Chem Phys, 42 (2), Jan 1965, 681-686. 18:40 552. Ionization and excitation of argon with alpha particles. ( U S A ) G S H u r s t et al, J Chem Phys, 42 (2), Jan 1965, 713-719. 18:40 553. Reactions of 12-135 eV H~ + ions with A t . ( U S A ) M G M e n e n d e z et ai, J Chem Phys, 42 (2), Jan 1965, 802-803.
326
19. Radiation 19 Measurement of oxygen adsorption on silicon by ellipsometry. See a b s t r a c t n u m b e r 529. 19 Laser-heated cathode. See abstract n u m b e r 591. 19 558. A new method of frequency tuning of a molecular generator by control of the vacuum in the generator casing. (USSR) E x p e r i m e n t a l results s h o w t h a t t h e m o l e c u l a r g e n e r a t o r f r e q u e n c y varies linearily with pressure up to 10 -5 torr. A t h i g h e r p r e s s u r e s the relationship is given by: d fdpc /s = A(p) ( f c /s-- f A). Where f c /s = g e n e r a t o r f r e q u e n c y in Hertz; f A = f r e q u e n c y c o r r e s p o n d i n g to the apex o f the e m i s s i o n line; p pressure in v a c u u m c h a m b e r ; A = constant. G M Strakhovskii and V M Tatarenkov, Proc Higher Ed Schools
"'Radiophysics", 7 (5), 1964, 992 994, (in Russian). 19:54 559. L a s e r s in medicine. (Great Britain) A report of a m e e t i n g a r r a n g e d jointly by the Electronics Division o f the I E E a n d the Medical a n d Biological G r o u p of t h e I E R E . T h e report deals largely with o p t h a l m o l o g y , for e x a m p l e in the welding of detached retinas a n d in m e a s u r i n g the resolution of the reti n a. R Brown, Electronic Equipment News, 6, Jan 1965, 40 44. 19 560. Optical coefficients of thin chromium films prepared by evaporation in a vacuum. ( U S A ) E F Idczak, Optics and Spectroscopy, 17 (6), Dec 1964, 501-503. 19 561. Effect of F-band illumination on the X-ray luminescence of alkali-halide phosphors. ( U S A ) N D M a k s i m o v a , Opt Soc Amer, 22 (5), Jan 1964, 426-427. 19 562. Infrared filters of evaporated gallium arsenide. ( U S A ) R P Howson, Opt Soc Amer, 55 (3), July 1964, 271-275. 19 563. Optical and photoelectric properties of thin metallic films in the vacuum ultraviolet. (USA) O m P Rustgi and G L Weissler, Opt Soc Amer, 55 (4), April 1965,
456. 19 : 16 564. Photodesorption. ( U S A ) R O Adams and E E Donaldson, J Chem Phys, 42 (2), Jan 1965,
770-774.
II. V a c u u m apparatus and auxiliaries 21. Pumps and pump fluids 21
Plasma vacuum pumps. See abstract n u m b e r 512. 21
Cryopumping. See abstract n u m b e r 513.