Decay studies

These techniques have very important applications to some of the micro-structural effects discussed previously in this chapter. For example, time-resolved measurements of the actual lattice strain at the impact surface will give direct information on rate of departure from ideal elastic impact conditions. Recall that the stress tensor depends on the elastic (lattice) strains (7.4). Measurements of the type described above give stress relaxation directly, without all of the interpretational assumptions required of elastic-precursor-decay studies. 

Neutrinoless double-beta decay and other rare decays studied using massive calorimeters. 

D. J. S. Birch, R. E. Imhof and C. Guo, Fluorescence decay studies using multiplexed time-correlated single-photon counting application to aminotetraphenylporphyrins, /. Photochem. Photobiol. A Chem. 42, 223-231 (1988). 

L. J. Libertini and E. W. Small, The intrinsic fluorescence of histone HI. Steady-state and fluorescence decay studies reveal heterogeneous emission, Biophys. J. 47, 765-772 (1985). 

T. Montenay-Garestier, M. Takasugi, and T. Le Doan, Fluorescence decay studies of peptide-nucleic acid complexes, in Nucleic Acids the Vectors of Life (B. Pullman and J. Jortner, eds.), pp. 305-315, Reidel, Dordrecht (1983). 

A. Gafni and L. Brand, Fluorescence decay studies of reduced nicotinamide adenine dinucleotide in solution and bound to liver alcohol dehydrogenase, Biochemistry 15, 3165-3171 (1976). 

G. Hoenes, M. Hauser, and G. Pjeiderer, Dynamic total fluorescence and anisotropy decay study of the dansyl fluorophore in model compounds and enzymes, Photochem. Photobiol. 43, 133-137 (1986). 

A. Gafni, R. P. DeToma, R. E. Manrow, and L. Brand, Nanosecond decay studies of a fluorescence probe bound to apomyoglobin, Biophys. J. 17, 155-168 (1977). 

H202 Decay Studies. Unfiltered lake waters were stored in washed 2-L polyethylene bottles in the dark, and the H202 concentrations were measured at specified intervals. Lake waters were filtered through 0.2-, 1.0-, 5.0-, and 12.0-p.m microfilters (Nuclepore). Zooplankton were removed with 30- xm woven nylon (Nitex) screens. Generally 1 L of filtrate was used. 

Samples for determining decay rates of H202 in Chesapeake Bay water were maintained as close to ambient water temperature as possible. The decay studies were conducted in 1-L glass bottles maintained in the dark without shaking. 

The temperature effect on the decay rate of H202 in unfiltered Sharpes Bay water was determined by allowing samples to equilibrate at several temperatures (Figure 6). H202 was spiked in all samples, and the decay was followed for several half-lives. With lower water temperatures the decay rate constants were lower. As yet this has not been verified over a season. As water temperatures change the relationship may differ for cold-tolerant species. H202 decay studies have also been conducted in waters from the... 

R.H. Bisseling, R. Kosloff, J. Manz, Dynamics of hyperspherical and local mode resonance decay studied by time dependent wave packet propagation, J. Chem. Phys. 83 (1985) 993. 

Table IV. Crystal Structures of Lanthanide Halides Used as Hosts for Einsteinium Halide Decay Studies...

In Fig. 1 is shown the part of the level scheme of 98Y which is observed in the study of the decay of the ps isomers (results of 13" decay studies are given in [SIS76, BEC83]). Compared to earlier work the relative intensities of the y transitions and K rays have been determined with higher precision which allows to deduce the mixing ratios 6 for the AI = 1 transitions inside the band (which show the typical behaviour for a rotational band) and the conversion coefficients for several of the y transitions, see Fig. 1. Additional y lines have been observed between the levels at 170 and 495 keV, and new information on the life times of levels was achieved from y-y-t measurements. 

The a-decay study of mass-separated nuclei in the region around Z=82 provides a strong spectroscopic tool to investigate intruder states. Here this method is applied to odd mass At nuclei and to odd-odd Bi nuclei. 

A systematic decay study of the i9°-200Bi isotopes was carried out by means of the heavy ion reactions natRe(16mg/cm2)[160(<180 MeV), xn] and 181Ta(8mg/cm2)[20Ne(<230 MeV),xn]. Multiscaled a-decay spectra for the masses 190, 192 and 194 were taken with the same a detector as used in the At experiment, together with a-y coincidences. A Ge detector (resolution 2 keV, relative efficiency 22% at 1332.5 keV) was used to detect y rays. In coincidence mode the lower limit on the y detector was set at - 40 keV. 

Most recently a complete e-decay study of the Tz = -2 nucleus Ar by the ISOLDE-group [BJO 85]has been reported. 

Traditionally, light-ion induced reactions have been used to produce light proton-rich nuclei, both for decay studies via (light-ion, xn) reactions and for mass measurements from reaction Q-values such as (a,... 

Data Table 8.6 Gamma-ray decay study of radionuclides on filters... 

Data Table 8.7 Alpha- and beta-particle decay study... 

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