Resonant Nuclear Scattering of Gamma-Rays: Theory and Preliminary Experiments

Moon, Philip

doi:10.1088/0370-1298/64/1/311

Cited by 72 publications

(15 citation statements)

References 6 publications

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“…As in Mössbauer experiments this resonance effect can be observed either in transmission or in scattering geometry. Based on early experiments performed by Moon, Mössbauer, Deutch, Metzger and others [184][185][186][187], the technique was used in the sixties and seventies to measure lifetimes of excited states in the 10~u-10~1 7 s time range and has been reviewed by Skorka [188], The recent interest in magnetic dipole states in deformed even-even nuclei (scissor-mode vibrations [189][190][191][192]225]) has revived the field, in particular as the linear polarization of the resonance-scattered photons allows one to differentiate between El and Ml radiations [193][194][195].…”

Section: Nuclear Resonance Fluorescencementioning

confidence: 99%

12 The Measurement of Nuclear Lifetimes

1997

Experimental Techniques in Nuclear Physics

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Table of Contents I. Scope and definitions 425 II. Decay constants of "rare" decays 427 A. Very long lifetimes 427 B. Very small activities 428 C. Precision studies of the neutron lifetime 434 III. Direct timing methods (10~6 > τ > 10" 15 s) 437 A. Electronic and pulsed beam timing methods 437 B. Recoil shadow timing methods 445 C. The recoil distance "plunger" method 447 D. The Doppler shift attenuation method 453 E. The GRID method 466 IV. Measurement of very short lifetimes (τ < 10" 15 s) 472 A. X-ray timing 473 B. Crystal blocking 474 C. Nuclear resonance fluorescence 475 D. Determination of narrow resonance widths 478 References 482 I. Scope and definitionsThe decay modes of ground states and the low-lying nuclear states up to about 10 MeV excitation energy via ß-decay, electromagnetic radiations, particle emission and/or fission have been extensively studied for many decades. In all domains of nuclear structure investigations, the measurement of absolute decay probabilities and nuclear lifetimes has given important insight into the facets of nuclear many-body systems and has provided detailed data for in-depth tests of nuclear models. Some of these decay modes involve fundamentally known interactions, e.g. the electro-weak interaction in the case of β-and γ-decay processes, and thus are directly sensitive to the nuclear model wave functions to be tested. Other processes like nucleon emission, α-decay and fission are more difficult to deal with theoretically, as here the wave functions of the nuclear states involved in the transition and the nuclear transition operator, which both determine the decay probabilities, depend on the model used.The experimentally accessible range of nuclear lifetimes covers more than forty-five (!) orders of magnitude. When just considering α-decays, we have, on the one hand, the Unauthenticated Download Date | 6/13/16 9:10 AM

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Section: Nuclear Resonance Fluorescencementioning

confidence: 99%

12 The Measurement of Nuclear Lifetimes

1997

Experimental Techniques in Nuclear Physics

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“…The first positive result for a method of restoring the condition of resonance was presented by Moon (30,31 Another method which depends on measuring the width of the nuclear level for the determination of the level lifetime is provided by the Mossbauer effect (32,33,34). In the Mossbauer effect, a low-energy gamma ray is emitted by a nucleus in a transition to the ground state.…”

Section: A Historical Surveymentioning

confidence: 99%

Some Lifetime Measurements of Isomeric States in the Rare Earth Region With Magnetic Coincidence Beta-Ray Spectrometers

McAdams¹,

Hatch²

1964

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“…The theoretical radiation lifetimes (Weisskopf 1951;Montalbetti 1952) are 1·7 X 10-11 sec for M1 and 1·0 xl0-7 sec for E2. The theoretical K-conversion coefficients of Rose, Goertzel, and Perry (1951) Graham and Bell (1951), Moon (1951), and Bell, Graham, and Petch (1952) indicate a half-life of __ 10-11 sec. The theoretical radiation lifetimes (Weisskopf 1951;Montalbetti 1952) are 5 X 10-13 sec for M1 and 4 xl0-10 sec for E2.…”

Section: L~gos: 137 Kevmentioning

confidence: 99%

Internal Conversion in the L-Subshells

Swan¹,

Hill²

1953

Aust. J. Phys.

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SummaryThe relative intensities of conversion-electron lines from the, three L-subshells have been determined for a number of y-transitions, and the results compared with the theoretical values of ~llman, Griffith, and Stanley (1952)_ Experiment has been shown to be in accord with theory.Calculations of theoretical K/L ratios indicate that the empirieal curves of Goldhaber and Sunyar (1951) may need to be modified, especially for low Z. For a given Z'/E, the K/L ratio increases with decreasing atomic number.

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Resonant Nuclear Scattering of Gamma-Rays: Theory and Preliminary Experiments

Cited by 72 publications

References 6 publications

12 The Measurement of Nuclear Lifetimes

12 The Measurement of Nuclear Lifetimes

Some Lifetime Measurements of Isomeric States in the Rare Earth Region With Magnetic Coincidence Beta-Ray Spectrometers

Internal Conversion in the L-Subshells

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