Consistent set of Q-values

Mattauch, J.; Thiele, W.; Wapstra, A.H.

doi:10.1016/0029-5582(65)90115-x

Cited by 242 publications

(13 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The beakers were heated overnight at 140 to 150°C to dissolve the chromic oxide and oxidize the Cr+ 3 to Cr+ 6 • Tests showed that, jf the temperature was kept between 140 and 150°C, only a small amount of chromium would be lost as chromyl chloride and almost all of the chromium would be oxidized to the hexavalent state. The solutions were cooled, diluted with 15 ml of water, and heated on a steam bath until starch iodide paper gave a negative test for chlorine_…”

Section: Preparation and Chromium Concentration Of The Separated Isotmentioning

confidence: 99%

Absolute isotopic abundance ratios and the atomic weight of a reference sample of chromium

Shields

Murphy

Catanzaro

et al. 1966

J. RES. NATL. BUR. STAN. SECT. A.

195

View full text Add to dashboard Cite

Ab so lut e va lu es have been obta in e d for th e iso topi c ab und a nce ratios of a re fe re nce sa mpl e of chromium. us ing s urface e mi ss ion ma ss s pec trom e try. Sa mpl es of known isotopi c compos ition , vrepa re d I rom nea rl y pure se parated c hromium isotop es, were use d to c alibrat e t he mass s pec l rom e tno. Th e res ulting ab solute valu es are C r 5 0/C,-5' = 0.051859 ± 0.000100, Cr'''/C r'' = 0.11 3386 ·± 0.000145 , C r"/C r52 = 0 .028222 ± 0 .000059, yie lding a n atomic we ig ht (C '2= 12) of 51.99612 ± 0.00033. The indi ca ted un ce rt a inties arE' overall limit s of e rro r bas ed on 95 pe rc e nt confidence limit s for th e nwa n and a llo wa nces for e ffec ts of k nown ::io UIT('S uf po ss ibl e sys tl'mali c (' ITOr. Ke y Word s : C hromium . a tomi c w(·ight. is otopi c a bund a nces. absolut e ratios.

show abstract

Section: Preparation and Chromium Concentration Of The Separated Isotmentioning

confidence: 99%

Absolute isotopic abundance ratios and the atomic weight of a reference sample of chromium

Shields

Murphy

Catanzaro

et al. 1966

J. RES. NATL. BUR. STAN. SECT. A.

195

View full text Add to dashboard Cite

show abstract

“…Rare gas moderator studies [2] showed that (IT)-activated bromine ions reacted by virtue of their kinetic energy. It is known from neutron binding energy data [39] that the kinetic energy spectrum for 80 Br born in a radiative neutron capture event, has a range from 0 to 417 eV with an average kinetic energy of ~ 300 eV. Bromine ions born in a Coulombic explosion event in methyl bromide have a kinetic energy ranging from 0 to 55 eV, with a most probable energy of 14 eV [12].…”

Section: Resultsmentioning

confidence: 99%

Energetic Bromine Reactions in Liquid Aqueous Solutions of Methyl Bromide

Opelanio-Buencamino¹,

El-Amri²,

Grauer³

et al. 1984

Radiochimica Acta

View full text Add to dashboard Cite

Reactions of ,0 Br activated by radiative neutron capture and ,2 Br activated by the reaction ,2m Br(IT) ,2 Br were investigated in crystalline and liquid methyl bromide and liquid aqueous solutions of methyl bromide. In all systems the major labelled organic product was methyl bromide. For liquid aqueous systems, ,0 Br-and ,2 Br-labelled yields decreased with decreasing concentrations. Methyl bromide molecules tended to aggregate in the liquid aqueous system. The tendency for aggregation diminished as the solute concentration approached zero where the probable state of the solute approached a monomolecular dispersion. The ,0 Br-and 82 Br-labelled methyl bromide yields extrapolated to 0.4 ±0.1 and 1.4 ± 0.2%, respectively, at zero solute concentration. Within experimental error these extrapolated yields correspond to methyl bromide gas phase failure to bond rupture values. The data suggest that the ,2m Br (IT) 82 Br process results in energetic bromine species in the liquid state. The Auger effect Coulombic explosion model may have limited applicability to small molecules in the liquid state.

show abstract

“…These predictions by Viola & Seaborg (48) of half-lives for decay by alpha-particle and beta particle emission use rather conventional systematics [see (4) for alpha-par ticle decay and (4) and (197) for beta-particle decay] , and use the most recent decay data of known nuclei, including the data of Mattauch, Thiele & Wapstra (27,28). The predictions for spontaneous fission half-life ( Figure 5) for even-even isotopes were derived from experimental data using the liquid drop model of the nucleus as applied by Myers SEABORG account for nuclear deformation and level structure effects in a manner consistent with the collective model as applied by Johansson (49,198).…”

Section: Decay Systematicsmentioning

confidence: 98%