| 1. |
- Cederwall, Bo, et al.
(författare)
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HIGH-SPIN STATES IN BA-121 AND DEFORMATION-DEPENDENT ALIGNMENTS
- 1991
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Ingår i: Nuclear Physics A. - 0375-9474 .- 1873-1554. ; 529:2, s. 410-428
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Tidskriftsartikel (refereegranskat)abstract
- The high-spin structure of 121Ba has been investigated by in-beam gamma-ray spectroscopic techniques. Rotational bands based on the h11/2, g7/2 and tentatively d5/2 quasineutron configurations have been established. The alignments of h11/2 protons and neutrons are identified at HBAR-omega-c = 0.35-0.40 MeV in the h11/2 and g7/2 bands whereas an alignment occurs at HBAR-omega-c = 0.29 MeV in the (tentatively) d5/2 band. B(M1)/B(E2) ratios were extracted and contributed to the configuration assignments. The results are interpreted within the cranked mean-field approach.
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| 2. |
- HILDINGSSON, L, et al.
(författare)
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HIGH-SPIN PHENOMENA IN OS-174
- 1992
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Ingår i: Nuclear Physics A. - 0375-9474 .- 1873-1554. ; 545:4, s. 871-888
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Tidskriftsartikel (refereegranskat)abstract
- High-spin states of 174Os have been investigated by means of the (Nd(S, 4n)Os)-Nd-146-S-32-Os-174 reaction using the ESSA30 multidetector system. The decay is dominated by the ground-state positive-parity band, two negative-parity 4- and 5- bands and another band starting at spin 9. Deformed shell-model calculations have been carried out to interpret the observed band structures. The role of the strongly shape-driving, non-aligned, pi-h9/2 configuration in the low-spin region of the ground-state band is discussed. The first band crossing is interpreted as due to the nu-i13/2 alignment. The two lowest side-bands are understood in terms of coupling to octupole excitations.
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| 3. |
- Larsson, U., et al.
(författare)
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Pelagic bacterial and phytoplankton in a subtropical marine environment exposed to chronic oil contamination.
- 1990
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Ingår i: Oil and Chemical Pollution. - 0269-8579. ; 7:2, s. 129-142
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Tidskriftsartikel (refereegranskat)abstract
- The abundance and production of pelagic bacteria, phytoplankton primary production and chlorophyll content were studied in coastal waters receiving the effluent from an oil refinery in the Arabian Gulf. The area also receives unknown amounts of other effluents rich in organic matter and nutrients. The abundance of bacteria was measured by epifluorescent direct counts, and productivity was estimated by 3H-thymidine uptake measurements. The results showed a clear stimulation of the primary productivity as well as elevated amounts of chlorophyll a in the area receiving the effluent. Both bacterial abundances and production were an order of magnitude higher in a small area close to the refinery outlet, but dropped rapidly and reached background values outside an impacted area of c 10 km2. The increased bacterial production in this area corresponded to a substrate demand of 4 to 11 tonnes of carbon per day, 4 to 12 times the daily discharge of some 0·9 tonnes of carbon in the form of petroleum hydrocarbons from the oil refinery. These data, plus the low petroleum hydrocarbon concentrations found in the sediments and in bivalves outside the impacted area, suggest that bacterial degradation of the petroleum hydrocarbons from the refinery could be a major process restricting the area impacted by oil pollution.
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| 4. |
- Lindén, Anna-Lisa, et al.
(författare)
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Boende
- 1991
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Ingår i: Klass och ohälsa - en antologi om orsaker till den ojämlika ohälsan.. ; , s. 118-143
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 5. |
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