Order number 940406-171827-13
page 54
set 5 with 102 of io QRFICEAL USE ONLY
950. ABSTRACT
The loading problem is to predict the forces
imposed on an isolated structure which is gtruck by a
given blast wave moving across the structure in a
direction normal to one
of its
faces,
and the net
horizontal and vertical forces as function of time are
found for the period during which the structure is
801.
immersed in the wave. The development of the loading
method was accomplished by a study of known theory and
existing experimental data. Data obtained by shock tube
studies were combined with theory to produce a set of
fundamental parameter plots and a rational
load-computation method. Equations of motion, used in
the prediction of response, are discussed and possible
alternate methods of solutions are given. Subjects for
future investigations are discussed.
KEYWORD(S)
GREENHOUSE/effects experiments ;STRUCTURES/blast
loading ;GREENHOUSE; STRUCTURES; SHOCK TUBES;BLAST MODEL
STUDIES
Item 94
150.
110.
70.
710.
REPORT NUMBER
WI--3
PRIMARY TITLE (M)
Alkali halide and phosphate glass radiological
casualty dosimeters.
Annex 5.1.
Annex A
[of]
scientific
director’s report of atomic weapon tests at Eniwetok,
1951. Operation Greenhouse
PERSONAL AUTHOR (M)
Alger, R.S.; Dyson, J.P.; Levy, R.A.; McQuilling,
CORPORATE SOURCE
D.W.
(USA)
Naval Radiological Defense Lab.,
San Francisco,
CA
371. PUB. DATE (YYMMDD)
510700
34. CLASSIF. LEVEL TEXT
Official Use Only
950. ABSTRACT
The production by ionizing radiations of color
centers in alkali halide crystals and fluorescent
centers in Ag-bearing phosphate glasses was investigated
as a basis for casualty-badge radiation dosimeters.
Doses of 25 r of
{sup
60}Co
{gamma}
rays were detected
by visible color changes in KBr and KCl crystals
sensitized by heating in a combined atmosphere of alkali
vapor and hydrogen. The sensitivity of the phosphate
glass is comparable to that of the crystals, but a
reading device is needed for the fluorescent
measurements.
The crystals
and glasses are strongly
energy~ dependent for x-ray energies below “about 150-kV
effective. The crystals and glasses can be bleached by
strong illumination in their respective optical
absorption bands; consequently, the exposed dosimeter
elements must be shielded from light between
observations. In a test bomb detonation the crystals and
glasses were exposed to total dosages of 17 to 4460 r at
5003478
OFFICIAL USE ONLY