Determination of relevant parameters for the use of electronic dosemeters in pulsed fields of ionising radiation

2012 ◽  
Vol 151 (3) ◽  
pp. 403-410 ◽  
Author(s):  
H. Zutz ◽  
O. Hupe ◽  
P. Ambrosi ◽  
J. Klammer
Keyword(s):  
Ionising Radiation ◽  
Pulsed Fields

scholarly journals Determination of methemoglobin in human blood after ionising radiation by EPR

2015 ◽  
Vol 77 ◽  
pp. 012028 ◽  
Author(s):  
M Polakovs ◽  
N Mironova-Ulmane ◽  
A Pavlenko ◽  
A Aboltins
Keyword(s):  
Human Blood ◽  
Ionising Radiation

Monte Carlo determination of the characteristic limits in measurement of ionising radiation--fundamentals and numerics

2009 ◽  
Vol 135 (3) ◽  
pp. 169-196 ◽  
Author(s):  
K. Weise ◽  
G. Kanisch ◽  
R. Michel ◽  
M. Schlager ◽  
D. Schrammel ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Ionising Radiation

THERMODYNAMIC STUDIES OF THE FIELD-INDUCED GAP IN THE QUASI-ONE-DIMENSIONAL S = 1/2 ANTIFERROMAGNET Yb4As3

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3018-3023
Author(s):  
M. LANG ◽  
S. ZHERLITSYN ◽  
B. WOLF ◽  
H. AOKI ◽  
T. CICHOREK ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Specific Heat ◽  
Spin Excitation ◽  
Elastic Mode ◽  
One Dimensional ◽  
Spin Lattice ◽  
Level Model ◽  
Pulsed Fields ◽  
Isothermal Measurements

The quasi-one-dimensional S = 1/2 antiferromagnet Yb 4 As 3 is studied by using low-temperature measurements of the specific heat C(T,B), thermal expansion α(T,B) and longitudinal elastic mode c 11(T,B). As has been previously shown [M. Köppen et al., Phys. Rev. Lett. 82, 4548 (1999)], finite magnetic fields perpendicular to the spin chains induce a gap in the spin-excitation spectrum (reminiscent of massive, soliton-like excitations) which manifests itself in distinct anomalies in the specific heat and thermal expansion. In this paper, we present an extension of the above work placing special emphasis on the lattice response and the evolution of the gap at higher fields. The main observations are: (i) the field-induced gap causes a minimum in the c 11 elastic constant both as a function of temperature and field. Applying a simple two-level model allows for a determination of the gap value Δ(B) as well as the constant G(B) = ∂Δ/∂ε introduced to account for the spin-lattice coupling. (ii) At B ≤ 9 T , the Δ(B) values derived from the various quantities are consistent with Δ (B) ∝ B 2/3 as predicted by the quantum sine-Gordon model. (iii) Measurements of C(T,B = const) in dc-fields up to 18 T and c 11(T = const, B) in pulsed fields up to 50 T,however, reveal deviations from this behavior at higher at field. (iv) Isothermal measurements of c 11 (B) show a sharp increase above 35 T which is almost T-independent for T ≤ 10 K and whose origin is unknown.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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