485. Metastable transitions in the mass spectrum of benzene

Classified

abstracts

482. Vibrational

482-497

excitation

of diatomic

molecules

40 impact.

by electron

I UsA) E Breig 3845.

and Chun C Lin, J Chem

Phys,

43 (II),

Dee 1965, 3839-

42 491. Science of ceramics, volume 2 G H Stewart (Editor), Academic Prexc, 84.5.

483. Thermodynamics of the dimerization and trimerization ous tungsten trioxide and molybdenunl trioxide. (USA) .J H Norman and H G Staley, J Cl7en7 Phys, 43 (/I), Dee 1965, 3804-3806. 40 484. Pressures of Hg and selenium over HgSe (c) from optical density measurements. (USA) R F Brebick, J Chem Phy.v, 43 (I I), Dee 1965, 3846-3852. 40 / USA) 485. Metastable transitious in the mass spectrum of benzene. K R Jennings, JChem Phys, 43 (II), Dee 1965.4176-4177. 40 486. Measurements of absolute total cross-sections for rare-gas scattering. (USA) E W Rothe and R H Neynaber, J Cheer Phy.5, 43 (ll), Dee 1965. 4177.4179.

492. Glass ceramics. P W McMillan, edited by J P Roher1.s and P Popper, Pre.c.c, London, 1964, 229 pages. 47s. 6d. 43. Plastics

and

and alloys

41 : 16 : 39 Study of adhesion and cohesion in vacuum. See abstract number 345. 41 : 20 : 30 High-vacuum apparatus for studying sublimation by the continuousweighing method. See abstract number 363. 41 : 30 Method for vacuum deposition of cobalt metal films using graphite crucibles. See abstract number 416. 41 : 30 Vacuum deposited molybdenum films. See abstract number 417. 41 : 30 Evaporation and nucleation in evaporated alloy films. See abstract number 440. 41 :30 Effect of the conditions of preparation of the substrates on the quality of epitaxial films of germanium in the chloride method. See abstract number 443. 41 :30 Characteristics of thin films of the In-Te system in the range SO-60 per cent Te. See abstract number 444. 41 :30 Mechanical properties of aluminium vacuum condensates. See abstract number 445. 41 : 30 Effect of substrate temperature on the structure of thin films of cadmium sulphide and selenide. See abstract number 446. 41 :30 Production of thin films of n-type semiconducting oxides by vacuum condensation, the evaporated material being heated by electron bombardment. See abstract number 447. 41 164 487. Behaviour and properties of refractory metals. T E Tietz and J W Wilson, Edward Arnold, London, 1965.

ceramics

and

oxides

refractory

42 Fibre optic vacuum

window.

See abstract

number

: 23

402. 42

(Japan) 488. Recent progress in glass technology. T Izumitani, J Vat Sot Japan, 8 (IO), Ocf 1965. Japanese),

326-332.

(in 42

489. Disintegration of ceramics i USSR 1 .A I Krokhiva and G V Spivak, 1386-1389.

and glass

under

ion bombardment.

Bull Acad Sri USSR,

490. Ceramics, plastics and metals: solids. R H Krock and M L Ebner, George

an introduction G Harrap,

28 (9))

1965.

42 : 64 to the science of

Puhl, 196.5.

: 64

rol I, Academic

elastomers

43 : 33 (USA) 493. The behaviour of materials at cryogenic temperatures. Understanding of the phenomena occurring at low temperatures permits materials scientists to select materials suitable for cryogenic applications. E C Heltemes and J R Packard, Indutrial Research, Nov 1965, 5259. 44. Waxes,

lubricants,

cements,

lacquers,

A method of testing dry film lubricants abstract number 414. 45. Soldering,

42. Glass,

1965, 431 pages, 42

40 of gase-

41. Metals

London,

: 64

welding,

brazing,

oils 44 : 30 vacuum. See

paints,

in an ultrahigh

solders

45 : 34 494. An apparatus for the investigation of cold welding in a simulated space environment Brief description of equipment used to study the tendency of metallic surfaces to cold weld when subjected to ultrahigh vacuum. A Juster, Proc Environmental Science, 1965, 445-448. 47. Outgassing data, residual analysis

data, gases

vapour pressure data, gettering in vacuum systems, residual gas

Study of absorption of gases on solids in the high-vacuum abstract number 344. Sorption of gases on metal surfaces number 346.

in ultrahigh

vacuum.

47 : I6 range. See 47 : I6 : 22 See abstract

47.21 :40 number 370. 47.21 :34 The influence of the residual gas atmosphere in space chambers on the neutral efflux and critical temperature of tungsten ionizers. See abstract number 37 I. 47.31 Factors influencing ultrahigh vacuum in microwave electron devices. See abstract number 45 I. 41 : 34 Vacuum compatibility of engineering materials (solids). See abstract number 460. 47 495. Investigation of residual gas composition in vacuum tubes with multi-alkali photocathodes. (USSR) N A Soboleva, et al, Bull Acad Sci USSR, 28 (9)) 1965, 1358-1364. 47 496. Some measurements with an omegatron in stainless steel systems. (Spain) An omegatron has been used for determining the residual gas composition of various stainless-steel vacuum systems in the pressure range 3.3 Is 10-j to 5 Y 10m9 torr, using different types of pumps. The omegatron has also been used for determining the processes which occur during bake-out, and when there are leaks or when the system is contaminated. (Spain) J Lozano, An RealSoc Esparl Fiz Qrrirn, 6lA, 3-4, 1965, 91-96. 47 497. Residual gas analysis of a DC 705 oil-diffusion pumped ultrahighvacuum system. (USA) The residual gases present in a DC 705 oil diffusion pump ultrahighvacuum system have been determined as a function of various trapping conditions. A systematic study has been conducted to determine the effectiveness of an optically dense zeolite-charged trap in reducing the gaseous contamination of ultrahigh vacuum systems by a metal 2 in. oil diffusion-pump connected In series with a specially designed trap. The configuration of the trap permitted the trapVapour

pressures

of vacuum

pump oils. See abstract

159