Despite the ecological and increasing commercial significance of cephalopods worldwide, little attention has been paid to developing techniques that investigate the movement of early life-history stages. We evaluated the potential of mass-marking giant Australian cuttlefish Sepia apama hatchlings, via immersion of eggs in water enriched in 137Ba isotope. Eggs were immersed in several 137Ba conc...

Recently we measured the ratio ofK-shell internal conversion coefficients, αK , for the 127.5-keV E3 transition in 134Cs and the 661.7-keV M4 transition in 137Ba. We here report a measurement of the 165.9-keV M1 transition in 139La, based on which we convert our earlier ratio measurement into individual αK values for the transitions in 134Cs and 137Ba. These results continue to confirm the Dira...

a simple and rapid method for the determination of 137ba isotope abundances in water samples by inductively coupled plasma-optical emission spectrometry (icp-oes) coupled with least-squares support vector machine regression (ls-svm) is reported. by evaluation of emission lines of barium, it was found that the emission line at 493.408 nm provides the best results for the determination of 137ba a...

We have measured the ratio of K-shell internal conversion coefficients, αK , for the 127.5-keV E3 transition in 134Cs and the 661.7-keV M4 transition in 137Ba. Previous measurements of these αK values led to a ratio that differed from calculated internal conversion coefficients. Our measured result, 30.01(15), disagrees with, but is a factor of three more precise than, the previous average of a...

The value of an isomer ratio (IR) in N=81 isotones (137Ba, 139Ce, 141Nd and 143Sm) is studied by means of the (γ, n) reaction. This quantity measures a probability to populate the isomer state in respect to the ground state population. In (γ, n) reaction giant dipole resonance (GDR) is excited and after its decay by neutron emission the nucleus has an excitation energy of a few MeV. The forthco...

The value of an isomeric ratio (IR) in N=81 isotones (137Ba, 139Ce, 141Nd and 143Sm) is studied by means of the (γ, n) reaction. This quantity measures a probability to populate the isomeric state in respect to the ground state population. In (γ, n) reactions, the giant dipole resonance (GDR) is excited and after its decay by a neutron emission, the nucleus has an excitation energy of a few MeV...

The value of an isomeric ratio (IR) in N=81 isotones (137Ba, 139Ce, 141Nd and 143Sm) is studied by means of the (γ, n) reaction. This quantity measures a probability to populate the isomeric state in respect to the ground state population. In (γ, n) reactions, the giant dipole resonance (GDR) is excited and after its decay by a neutron emission, the nucleus has an excitation energy of a few MeV...