Data from a Princeton Gamma-Tech Ge(Li) detector will pop out like this
Optical crystals now available from Optovac: NaCI, KBr, KCI, NaF, LiF, CaF2, BaFz, SrF2, MgF2, Laser and Research Crystals Cell Windows—Optovac's cell w i n d o w blanks are semi-finished . . . p r e c i s e l y dimensioned and rough ground, ready for polishing. For many uses, a quick cloth buffing is sufficient. The technique is similar to that for restoring fogged w i n d o w s , and is readily learned w i t h practice. The savings w i l l surprise you. Spectroscopists can n o w meet a budget as w e l l as maintain a larger inventory of sampling accessories to help get the most from their instruments. A l s o , difficult or messy analyses can be performed w i t h little w o r r y about the cost of cell damage. Every piece is inspected to maintain strict quality standards. Service is quicker, too. Common sizes are stocked. Since Optovac grows its o w n optical crystals, unusual pieces can be promptly fabricated from bulk material on hand. The Optovac Sodium Chloride Brochure contains price information and techniques for w o r k i n g rocksalt crystals. Lens and Prism Blanks—Close tolerances on diameter and thickness can be maintained to facilitate optical finishing. Optovac's 1 0 0 % inspection is your guarantee of uniformly high quality.
0 t o 1.0 M e V p o r t i o n of s p e c t r u m f r o m n a t u r a l t h o r i u m n i t r a t e s a m p l e ( b a l a n c e of s p e c t r u m , not s h o w n , e x t e n d s t o 2.6 M e V ) .
at surprisingly low activity levels. Photopeaks stand out clearly. Y o u
can easily
resolve
weak gamma-rays from background that you can't possibly see with any other type of detector. Y o u can get a q u i c k r e a d i n g on c o n t a m i n a t i o n of fission p r o d u c t s or of
Lasers and Research Crystals—Emphasis on crystal quality and careful study of g r o w i n g conditions have led to an unusual O p t o v a c competence in its field of halide crystal preparation. A new O p t i c a l Maser and Doped Crystal Brochure by O p t o v a c contains information on polished and coated rods, laser blanks, and d o p e d research crystals. In addition to the Sodium Chloride and Optical Maser Brochures, a 56-page General Catalog is available. Transmission curves, index of refraction data, and other physical properties are included for all Optovac crystals. Write for your free literature, today.
OPTOVAC
OPTOVAC, INC.
Dept. L NORTH BROOKFIELD, MASS. 01535 Tel: (617)867-3767 Circle No. 70 on Readers' Service Card
reactor systems. Y o u simplify the analysis of neutron activ a t i o n . D e t e c t o r r e s o l u t i o n is b e t t e r t h a n 5 k e V ( F W H M ) . Generally
speaking, the
whole
job
of
isolating
multi-
component time-dependent spectra from the decay radionuclides
is m a d e
easier.
Faster.
Less
of
expensive.
Y o u ought to look into Princeton G a m m a - T e c h ' s
Ge(Li)
d e t e c t o r - c r y o s t a t systems. Sensitive volumes t o 30 c m 3 ; one-year full-use warranty. Send for Bulletin A-6.
PRINCETON GAMMA-TECH Box 641, Princeton, N. J., U.S.A. · (609) 924-7310 Circle No. 105 on Readers' Service Card VOL 38, NO. 6, MAY 1966
·
145 A
