ISOTOPIC SHIFT BETWEEN THE STRONTIUM ISOTOPES 84, 86, 88, AND 90 AND THE FLOW IN THE NUCLEAR VOLUME EFFECT NEAR NEUTRON NUMBER 50

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Z. Physik

DOI:https://doi.org/10.1007/BF01338933· OSTI ID:4056427

Heilig, K

The isotopic shift in the strontium isotopes 84, 86, 88, and 90 (neutron numbers 46, 48, 50, and 52) was investigated with a recording photoelectric Fabry- Perot spectrometer. Hollow cathodes covened with only 1 nag of material to be studied were used as light sources, which permitted the intensive excitation of the resonance lines of the I and II spectra for 4 hr. The isotopic shift of the stable isotopes 84, 86, and 88 has the sign of the nuclear mass effect. The shift between the isotope 88 and radioisotope 90, on the other hand, has the sign of the nuclear volume effect. The isotopic positions in the strontium II resonance lines are (84) -12.4 plus or minus 0.5, (86) -5.8 plus or minus 0.3, (88) 0, and (90) -11.4 plus or minus 1.2 (x 10/sup -3/ cm/sup -1/). A corresponding isotope position was found in the strontium I resonance lines. It was established that in the introduction of two neutrons outside the closed shell N = 50 the nuclear volume effect of the isotopic shift jumps from small to large values. The jump occurring at N = 50 in the nuclear volume effect is of the same magnitude as the well-known jump at N = 82. (tr-auth)

• Research Organization: Universitat, Heidelberg
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-015094
• OSTI ID: 4056427
• Journal Information: Z. Physik, Journal Name: Z. Physik Vol. Vol: 161
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

ATOMIC MODELS
CATHODES
ENERGY LEVELS
EXCITATION
FABRY-PEROT INTERFEROMETER
INSTRUMENTS
IONS
ISOTOPE EFFECTS
LIGHT
MASS
MEASURED VALUES
NEUTRONS
NUCLEAR MODELS
NUCLEONS
PHOTOELECTRIC EFFECT
PHYSICS
RADIATION SOURCES
RESONANCE
SHELL MODELS
SPECTRA
SPECTRAL SHIFT
SPECTROMETERS
STRONTIUM 84
STRONTIUM 86
STRONTIUM 88
STRONTIUM 90
VOLUME