NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = R.J.Gehrke Found 52 matches. 2005RE06 J.Radioanal.Nucl.Chem. 264, 243 (2005) E.L.Reber, R.J.Gehrke, R.Aryaeinejad, J.K.Hartwell Measurement of the fission yields of selected prompt and decay fission product gamma-rays of spontaneously fissioning 252Cf and 244Cm RADIOACTIVITY 244Cm, 252Cf(SF); measured Eγ, Iγ; deduced fission fragments isotopic yields.
doi: 10.1007/s10967-005-0701-1
2004GE01 Nucl.Instrum.Methods Phys.Res. B213, 10 (2004) R.J.Gehrke, R.Aryaeinejad, J.K.Hartwell, W.Y.Yoon, E.Reber, J.R.Davidson The γ-ray spectrum of 252Cf and the information contained within it RADIOACTIVITY 249,251,252Cf(α), (SF); measured Eγ, Iγ; deduced cumulative γ-ray yields.
doi: 10.1016/S0168-583X(03)01526-X
2004VO16 Phys.Rev.Lett. 93, 172501 (2004) C.Vockenhuber, F.Oberli, M.Bichler, I.Ahmad, G.Quitte, M.Meier, A.N.Halliday, D.-C.Lee, W.Kutschera, P.Steier, R.J.Gehrke, R.G.Helmer New Half-Life Measurement of 182Hf: Improved Chronometer for the Early Solar System RADIOACTIVITY 182Hf(β-); measured T1/2. Neutron activation, isotope dilution, activity measurement. Astrophysical implications discussed.
doi: 10.1103/PhysRevLett.93.172501
2003GE08 Nucl.Instrum.Methods Phys.Res. A511, 444 (2003) R.J.Gehrke, J.D.Baker, J.K.Hartwell, C.L.Riddle, C.A.McGrath Measurement of neutron-to-γ-ray production ratios from (α, n) reactions for their application to assay TRU waste NUCLEAR REACTIONS 19F, 25Mg, 27Al(α, n), E ≈ 5.5 MeV; measured relative γ-ray intensities, neutron yields.
doi: 10.1016/S0168-9002(03)02011-4
2002GE02 Appl.Radiat.Isot. 56, 567 (2002) R.J.Gehrke, J.D.Baker, C.L.Riddle Feeding of the 232Th Levels from the Decay of 236U RADIOACTIVITY 236U(α); measured Eγ, Iγ; deduced emission probabilities. 232Th levels deduced feeding intensities.
doi: 10.1016/S0969-8043(01)00152-X
2001LA14 J.Radioanal.Nucl.Chem. 248, 247 (2001) S.P.LaMont, R.J.Gehrke, S.E.Glover, R.H.Filby Precise Determination of the Intensity of 226Ra Alpha Decay to the 186 keV Excited State RADIOACTIVITY 226Ra(α); measured Eα, Iα, E(ce), I(ce); deduced decay probabilities to ground, excited states. 222Rn levels deduced α-feeding probabilities.
doi: 10.1023/A:1010696007069
1995GE18 J.Radioanal.Nucl.Chem. 194, 221 (1995) R.J.Gehrke, K.D.Watts, C.R.Amaro Field Performance Test of PASS, an Instrument for the Rapid Assay of Plutonium and Other γ-Ray Emitting Radionuclides
doi: 10.1007/BF02037631
1994GE13 Nucl.Instrum.Methods Phys.Res. A353, 109 (1994) R.J.Gehrke, K.D.Watts, E.W.Killian, M.H.Putnam, R.G.Helmer PASS, an Extended-Range Ge Spectrometer for Radionuclide Analysis Via L X-, γ-Ray Spectrometry RADIOACTIVITY 239Pu, 241Am(α); 60Co, 137Cs(β-); analyzed data; deduced extended range Ge spectrometer characteristics for radionuclide analysis.
doi: 10.1016/0168-9002(94)91614-4
1990BA57 J.Radioanal.Nucl.Chem. 142, 159 (1990) J.D.Baker, D.H.Meikrantz, R.J.Gehrke, R.C.Greenwood Nuclear Decay Studies of Rare-Earth Fission-Product Nuclides Using Fast Radiochemical Separation Techniques RADIOACTIVITY 153,154Pm; analyzed decay data. 153,154Sm deduced levels. On-line element separation facility, rare-earth fission products.
doi: 10.1007/BF02039460
1990CO17 Nucl.Instrum.Methods Phys.Res. A290, 537 (1990) B.M.Coursey, R.Vaninbroukx, D.Reher, J.M.R.Hutchinson, P.A.Mullen, K.Debertin, R.J.Gehrke, J.W.Rogers, L.D.Koeppen, D.Smith The Standardization of 93mNb for Use as a Reference Material for Reactor Neutron Dosimetry RADIOACTIVITY 93mNb; measured K X-ray emission rate; deduced standardized K X-ray emission probability.
doi: 10.1016/0168-9002(90)90574-P
1990GE05 Phys.Rev. C41, 2878 (1990) R.J.Gehrke, C.Casey, R.K.Murray Half-Life of 176Lu RADIOACTIVITY 176Lu(β-); measured T1/2, Iγ. 176Hf levels deduced γ-emission probabilities.
doi: 10.1103/PhysRevC.41.2878
1990GE11 Nucl.Instrum.Methods Phys.Res. A299, 302 (1990) Revision of the ANSI N42.14 Performance Standard for Ge Gamma-Ray Spectrometry RADIOACTIVITY 241Am, 109Cd, 60,59Co, 203Hg, 113,85Sn, 85Sr, 137Cs, 88Y; analyzed, revised detector performance, calibration standardization. ANSI standard N42.14 group study, mixed source.
doi: 10.1016/0168-9002(90)90796-9
1985WI04 Int.J.Appl.Radiat.Isotop. 36, 123 (1985) Gamma Emission Probabilities in the Decay of 241Pu and 237U, Determined from the In-Growth of 241Am RADIOACTIVITY 241Pu(α), (β-); 241Am(α) [from 241Pu(β-decay)]; 237U(β-) [from 241Pu(α-decay)]; measured Iγ, γ-emission probabilities. 241Pu deduced decay rate. 237Np, 237U transitions deduced γ-emission probability uncertainity limit.
doi: 10.1016/0020-708X(85)90226-1
1984GE07 Int.J.Appl.Radiat.Isotop. 35, 581 (1984) R.J.Gehrke, V.J.Novick, J.D.Baker γ-Ray Emission Probabilities for the 232U Decay Chain RADIOACTIVITY 232U(α); 228Th(α) [from 232U decay]; 224Ra(α) [from 228Th decay]; 220Rn(α) [from 224Ra decay]; 216Po(α) [from 220Rn decay]; 212Pb(β-) [from 216Po decay]; 212Bi(α), (β-) [from 212Pb decay]; 212Po(α) [from 212Bi decay]; 208Tl(β-) [from 212Bi decay]; measured γ-emission probabilities. 4π αγ-coincidence counting, γ-spectroscopic methods.
doi: 10.1016/0020-708X(84)90100-5
1984RE05 Int.J.Appl.Radiat.Isotop. 35, 185 (1984) C.W.Reich, R.G.Helmer, J.D.Baker, R.J.Gehrke Emission Probabilities and Energies of γ-Ray Transitions from the Decay of 233U RADIOACTIVITY 233U(α); measured γ-emission rates, Eγ following α-decay.
doi: 10.1016/0020-708X(84)90232-1
1983GE11 Int.J.Appl.Radiat.Isotop. 34, 1437 (1983) Emission Probability of the 316-keV γ-Ray Emitted in the Decay of 146Ce RADIOACTIVITY 146Ce(β-); measured T1/2. 146Pr deduced transition, γ-emission probability, relative Iγ.
doi: 10.1016/0020-708X(83)90043-1
1983GR02 Phys.Rev. C27, 1266 (1983) R.C.Greenwood, R.J.Gehrke, J.D.Baker, D.H.Meikrantz, C.W.Reich Identification of a New Isotope, 165Tb RADIOACTIVITY 165Tb(β-) [from 252Cf(SF)]; measured Eγ, Iγ, T1/2; deduced log ft. 165Dy deduced levels, J, π. Radiochemical separation, Ge(Li) detectors.
doi: 10.1103/PhysRevC.27.1266
1982BA76 J.Radioanal.Chem. 74, 117 (1982) J.D.Baker, R.J.Gehrke, R.C.Greenwood, D.H.Meikrantz Advanced System for Separation of Rare-Earth Fission Products RADIOACTIVITY 152,153,154Pm(β-) [from 252Cf(SF)]; measured Eγ, Iγ. 160Eu(β-) [from 252Cf(SF)]; measured T1/2. Spectral multiscaling technique, microprocessor controlled radiochemical separation.
doi: 10.1007/BF02520365
1982GE03 Int.J.Appl.Radiat.Isotop. 33, 355 (1982) γ-Ray Emission Probability for the Decay of 143Ce RADIOACTIVITY 143Ce [from neutron irradiation of 142Ce]; measured βγ-coin, Eγ, Iγ. 143Pr levels deduced γ-emission probabilities, relative Iγ.
doi: 10.1016/0020-708X(82)90148-X
1982GE04 Z.Phys. A306, 363 (1982) R.J.Gehrke, R.C.Greenwood, J.D.Baker, D.H.Meikrantz Identification of a New Isotope, 168Dy RADIOACTIVITY 168Dy [from 252Cf(SF)]; measured T1/2, Eγ, Iγ; deduced γ-emission probability for transition. 168Ho levels deduced relative Iγ. Helium jet rapid chemical separation.
doi: 10.1007/BF01432377
1982GE07 Radiochim.Acta 31, 1 (1982) R.J.Gehrke, R.C.Greenwood, J.D.Baker, D.H.Meikrantz A New Isotope 163Gd; Comments on the decay of 162Gd RADIOACTIVITY 162Gd(β-), 163Gd(β-) [from 252Cf(SF)]; measured Eγ, Iγ, T1/2. 163,162Gd levels deduced γ-emission probability. 162Tb deduced level, possible J. Heluim jet transport system.
doi: 10.1524/ract.1982.31.12.1
1982GR13 Radiochim.Acta 30, 57 (1982) R.C.Greenwood, R.J.Gehrke, J.D.Baker, D.H.Meikrantz Identification of a New Isotope, 155Pm, Produced in 252Cf Fission RADIOACTIVITY 155Pm [from 252Cf(SF), chemical separation]: measured Eγ, Iγ, T1/2. 155Sm deduced levels, γ-branching.
1982HE02 Int.J.Appl.Radiat.Isotop. 33, 23 (1982) R.G.Helmer, C.W.Reich, R.J.Gehrke, J.D.Baker Emission Probabilities and Energies of γ-Ray Transitions from the 239Pu Decay RADIOACTIVITY 239Pu; measured Eγ, relative Iγ following α-decay; deduced emission probabilities.
doi: 10.1016/0020-708X(82)90201-0
1981BA09 Radiochim.Acta 28, 51 (1981) J.D.Baker, R.J.Gehrke, R.C.Greenwood, D.H.Meikrantz Rapid Separation of Individual Rare-Earth Elements from Fission Products RADIOACTIVITY, Fission 252Cf(SF); measured Eγ, T1/2; deduced yields for Gd, Eu, Sm, Pm, Nd, Pr, Ce, La. Microprocessor controlled rapid radiochemical separation system.
1981GE04 Int.J.Appl.Radiat.Isotop. 32, 377 (1981) γ-Ray Emission Probabilities for the Decays of 141La and 142La RADIOACTIVITY 141,142La [from 235U(n, F), E=thermal, carrier separation]; measured T1/2, γ-emission probability. 4π β-γ coincidence technique.
doi: 10.1016/S0020-708X(81)81003-4
1981HE15 Nucl.Instrum.Methods 188, 671 (1981) R.G.Helmer, A.J.Caffrey, R.J.Gehrke, R.C.Greenwood γ-Ray Energies from the Decay of 99Mo, 133Ba and 210Pb RADIOACTIVITY 99Mo, 133Ba, 210Pb; measured Eγ. Coaxial Ge detector.
doi: 10.1016/0029-554X(81)90281-0
1981ME17 Radiochim.Acta 29, 93 (1981) D.H.Meikrantz, R.J.Gehrke, L.D.McIsaac, J.D.Baker, R.C.Greenwood An Automated System for Selective Fission Product Separations; decays of 113-115Pd RADIOACTIVITY 113,113m,114,115Pd(β-); 113,114,115Ag(β-) [from 113,114,115Pd(β-decay)]; measured Eγ, Iγ, T1/2; deduced parent, daughter γ-emission ratios. 113,115Cd; deduced levels. Microcomputer controlled radiochemical separation system, 252Cf(SF) decay.
1980BA51 J.Inorg.Nucl.Chem. 42, 1547 (1980) J.D.Baker, R.J.Gehrke, R.C.Greenwood, D.H.Meikrantz, V.J.Novick A New Isotope 158Sm; Comments on the Decay of 157Sm RADIOACTIVITY 158,157Sm [from 252Cf(SF), radiochemical separation]; measured Eγ, Iγ, T1/2. 157Eu deduced levels. RADIOACTIVITY, Fission 252Cf(SF); measured Eγ, Iγ, T1/2; deduced evidence for 158Sm. Radiochemical separation.
doi: 10.1016/0022-1902(80)80317-4
1980GE04 Int.J.Appl.Radiat.Isotop. 31, 37 (1980) Gamma-Ray Emission Probabilities and Half-Life of 139Ba RADIOACTIVITY 139Ba; measured Eγ, Iγ, βγ-coin, T1/2; deduced Iβ. 139La transitions deduced relative Iγ. 4π-coin counting, Ge(Li) spectrometer.
doi: 10.1016/0020-708X(80)90227-6
1980GE10 Int.J.Appl.Radiat.Isotop. 31, 675 (1980) Emission Probability of the 453 keV γ-Ray Emitted in the Decay of 146Pr RADIOACTIVITY 146Pr [from 235U(n, F), E=thermal]; measured T1/2. 146Nd level deduced γ-emission probability, β-branching. 4π β-γ coincidence technique.
doi: 10.1016/0020-708X(80)90003-4
1980GE11 Int.J.Appl.Radiat.Isotop. 31, 509 (1980) Absolute Intensities of the γ-Rays Emitted in the Decay of 145Pr RADIOACTIVITY 145Pr [from 235U(n, F), E=thermal]; measured T1/2, absolute Iγ. 4π β-γ coincidence counting, Ge(Li)detectors.
doi: 10.1016/0020-708X(80)90315-4
1979GE08 Nucl.Sci.Eng. 70, 298 (1979) R.J.Gehrke, R.G.Helmer, C.W.Reich Emission Probability of the 312-keV Gamma Ray from the Decay of Protactinium-233 RADIOACTIVITY 233Pa [from 237Np, chemical separation]; measured Iγ, βγ-coin, I(K X-ray)/Iγ. 233U transition deduced Eγ.
doi: 10.13182/NSE79-A20151
1979GR01 Nucl.Instrum.Methods 159, 465 (1979) R.C.Greenwood, R.G.Helmer, R.J.Gehrke Precise γ-Ray Energies for Calibration of Ge Semiconductor Spectrometers to 3.5 MeV RADIOACTIVITY 24Na, 48V, 56,58,60Co, 82Br, 84Rb, 88Y, 110mAg, 124Sb, 125Sn, 132Cs, 144Ce, 207Bi, 228Th; measured Eγ within 5-15 eV, referenced to 411.80441 keV γ-ray of 198Au; deduced calibration standards in Ge semiconductor spectroscopy up to 3.5 MeV.
doi: 10.1016/0029-554X(79)90675-X
1979HE12 Int.J.Appl.Radiat.Isotop. 30, 15 (1979) γ-Ray Intensities from 197Hg (64 h) Decay RADIOACTIVITY 197Hg [from n-irradiation of 196Hg]; measured relative Iγ.
doi: 10.1016/0020-708X(79)90091-7
1979HE13 Nucl.Instrum.Methods 166, 547 (1979) R.G.Helmer, R.J.Gehrke, R.C.Greenwood γ-Ray Energies for 40K, 108mAg and the 226Ra Decay Chain RADIOACTIVITY 40K, 108mAg, 226Ra; measured Eγ; deduced calibration for Ge semiconductor detectors.
doi: 10.1016/0029-554X(79)90548-2
1979RE01 Phys.Rev. C19, 188 (1979) C.W.Reich, R.G.Helmer, R.J.Gehrke Energy Levels of 250Cf Populated in the β- Decay of 250Bk RADIOACTIVITY 250Bk [from 254Es-α decay]; measured Eγ, Iγ, γγ-coin, βγ-coin, T1/2. 250Cf deduced levels, J, π, log ft. Ge(Li), Si(Li) detectors, chemical separation.
doi: 10.1103/PhysRevC.19.188
1978HE21 Nucl.Instrum.Methods 155, 189 (1978) R.G.Helmer, R.C.Greenwood, R.J.Gehrke Reevaluation of Precise γ-Ray Energies for Calibration of Ge(Li) Spectrometers COMPILATION 51Cr, 57,60Co, 109Cd, 137Cs, 139,141Ce, 145Eu, 153Sm, 160Tb, 169Yb, 170Tm, 183Ta, 198,199Au, 203Hg, 241Am, 192Ir, 182Ta, 152Eu, 153Gd, 169Yb, 7Be, 22Na, 46Sc, 54Mn, 58Co, 59Fe, 65Zn, 75Se, 85Sr, 88Y, 94,95Nb, 95Zr, 95mTc, 113Sn, 133Ba, 185Os, 203Pb, 207Bi, 228Th; compiled, reevaluated Eγ, measurement relative to 411-keV γ-ray from 198Au. Curved-crystal diffraction spectrum.
doi: 10.1016/0029-554X(78)90204-5
1977GE10 Int.J.Appl.Radiat.Isotop. 28, 744 (1977) Absolute γ-Ray Intensities from 127Xe Decay RADIOACTIVITY 127Xe; measured absolute Iγ, relative Iγ, Eγ.
doi: 10.1016/0020-708X(77)90101-6
1977GE12 Nucl.Instrum.Methods 147, 405 (1977) R.J.Gehrke, R.G.Helmer, R.C.Greenwood Precise Relative γ-Ray Intensities for Calibration of Ge Semiconductor Detectors RADIOACTIVITY 56Co, 75Se, 82Br, 110mAg, 125Sb, 133Ba, 140Ba, 140La, 144Ce, 144Pr, 152Eu, 166mHo, 169Yb, 182Ta, 228Th, 208Tl; measured precise relative Iγ.
doi: 10.1016/0029-554X(77)90276-2
1977HE05 Phys.Rev. C15, 1453 (1977) R.G.Helmer, C.W.Reich, R.J.Gehrke, R.C.Greenwood, R.A.Anderl Decay of 128Cs RADIOACTIVITY 128Cs; measured Eγ, Iγ, γγ-coin; deduced log ft. 128Xe deduced levels, J, π. Isotope separation, Ge(Li) detectors.
doi: 10.1103/PhysRevC.15.1453
1976GE10 J.Inorg.Nucl.Chem. 38, 1929 (1976) Half-Lives of 134La and 132-135Ce RADIOACTIVITY 134La, 132,133,134,135Ce; measured T1/2.
doi: 10.1016/0022-1902(76)80440-X
1976GE14 Phys.Rev. C14, 1896 (1976) R.J.Gehrke, R.G.Helmer, C.W.Reich, R.C.Greenwood, R.A.Anderl Level Structure of 131Cs and the Decay Energy of 131Ba RADIOACTIVITY 131Ba; measured Eγ, Iγ, γγ-coin; deduced Q, log ft. 131Cs deduced levels, γ-branching. Isotope separation, Ge(Li) detectors.
doi: 10.1103/PhysRevC.14.1896
1976GR09 Nucl.Phys. A270, 29 (1976) R.C.Greenwood, R.J.Gehrke, R.G.Helmer, C.W.Reich Gamma-Ray Emission from 134Ce and Levels in 134La RADIOACTIVITY 134Ce [from Pr, (p, spallation)]; measured Eγ, Iγ, T1/2, γγ-coin; deduced Q(EC), log ft, J, π. 134La deduced levels, J, π. Ge(Li), Si(Li) detectors, isotope separation, chemical separation.
doi: 10.1016/0375-9474(76)90125-1
1976GR11 Phys.Rev. C14, 1906 (1976) R.C.Greenwood, C.W.Reich, R.G.Helmer, R.J.Gehrke, R.A.Anderl 134Ba Level Scheme as Observed in the Decay of 134La RADIOACTIVITY 134La [from Pr(p, X)]; measured Eγ, Iγ, γγ-coin; deduced log ft, ICC. 134Cs; measured Eγ. 134Ba deduced levels, J, π, λ. Ge(Li), Si(Li) detectors.
doi: 10.1103/PhysRevC.14.1906
1976HE04 Nucl.Phys. A258, 83 (1976) R.G.Helmer, R.J.Gehrke, R.C.Greenwood, C.W.Reich, L.D.McIsaac Decay of 128Ba RADIOACTIVITY 128Ba [from Pr (p, spallation)]; measured Eγ, Iγ, γγ-coin; deduced log ft. 128Cs deduced levels, J, π. Ge(Li), Si(Li) detectors, isotope separation.
doi: 10.1016/0375-9474(76)90529-7
1973GE03 Priv.Comm. (March 1973)
1973GE05 Nucl.Phys. A204, 26 (1973) The Decay of 192Ir RADIOACTIVITY 192Ir; measured Eγ, Iγ; deduced log ft. 192Os, 192Pt deduced levels. α(K), γ-branching. Ge(Li) detectors.
doi: 10.1016/0375-9474(73)90003-1
1971GE07 Nucl.Instrum.Methods 91, 349 (1971) R.J.Gehrke, J.E.Cline, R.L.Heath Determination of Relative Photopeak Efficiency and System Linearity for Ge(Li) Gamma-Ray Spectrometers RADIOACTIVITY 75Se, 82Br, 56Co; measured Eγ, Iγ. Ge(Li) detector.
doi: 10.1016/S0029-554X(71)80009-5
1971GE11 Nucl.Instrum.Methods 97, 219 (1971) Calibration of the Efficiency of a Si(Li) Photon Spectrometer in the Energy Region 5 to 125 keV RADIOACTIVITY 145Pm, 155Eu, 241Am; measured Iγ, I(X-ray). 60m-Co, 94mNb, 176mLu, 192mIr, 210Pb; measured I(X-ray)/Iγ. 60mCo, 94mNb, 176mLu transitions deduced α(K). 192mIr, 210Bi transitions deduced α(L). Detector - Si(Li).
doi: 10.1016/0029-554X(71)90275-8
1971HE20 Nucl.Instrum.Methods 96, 173 (1971) R.G.Helmer, R.C.Greenwood, R.J.Gehrke Precise Comparison and Measurement of Gamma-Ray Energies with a Ge(Li) Detector II. 400-1300 keV RADIOACTIVITY 22Na, 56,58,60Co, 182Ta, 65Zn, 59Fe, 88Y, 46Sc, 160Tb, 54Mn, 95Zr, 94,95Nb, 137Cs, 110mAg, 185Os, 208Tl, 95mTc, 207Bi, 85Sr, 7Be, 192Ir, 198Au, 203Pb; measured Eγ.
doi: 10.1016/0029-554X(71)90452-6
1970GR13 Nucl.Instrum.Methods 77, 141 (1970) R.C.Greenwood, R.G.Helmer, R.J.Gehrke Precise Comparison and Measurement of Gamma-Ray Energies with a Ge(Li) Detector I. 50-420 keV RADIOACTIVITY 57Co, 75Se, 109Cd, 113Sn, 133Ba, 139,141Ce, 153Gd, 182Ta, 199Au, 192Ir, 203Hg; measured Eγ. Ge(Li) detector.
doi: 10.1016/0029-554X(70)90592-6
1969GE02 Phys.Rev. 177, 1792 (1969) Decay of 102-Rh and 102m-Rh RADIOACTIVITY 102Rh; measured Eγ, Iγ, γγ-coin. 102Ru deduced levels, J, π. Ge(Li) detector.
doi: 10.1103/PhysRev.177.1792
Back to query form |