17 Result(s)

Article

Comparing transformation pathways across major economies

This paper explores the consequences of different policy assumptions and the derivation of globally consistent, national low-carbon development pathways for the seven largest greenhouse gas (GHG)–emitting coun...

R. Schaeffer, A. Köberle, H. L. van Soest, C. Bertram, G. Luderer… in Climatic Change (2020)

Chapter and Conference Paper

Low-Mass Objects and the Dark Matter in the Halo

If the unseen matter in our Galaxy is provided by very low-mass star-like objects, we show that the halo infrared luminosity is dominated by 0. 1M _⊙ objects. In this case, the halo IMF must be muc...

G. Chabrier, D. Méra, R. Schaeffer in The Bottom of the Main Sequence — And Beyond (1995)

Article

Mixed Metal Oxide Interfaces: An Experimental and Theoretical Assessment of Secondary Metal Influences in Metal Impregnated Aluminas

Studies of the mixed-metal interface in metal impregnated alumina have indicated the possibility of much metal-metal and metal-substrate interaction. Studies were carried out on NiCu/Al₂O₃ system which was evalua...

M. Malaty, D. Singh, R. Schaeffer, S. Jansen, S. Lawrence in MRS Online Proceedings Library (1994)

Chapter and Conference Paper

The light curve of SN 1987 A

We use a semi-analytical model of supernova light curves that extends Arnett's scheme [1,2] to include the effect of recombination of hydrogen, helium and heavy elements in the expanding ejecta. Introducing in...

R. Schaeffer, M. Cassé, R. Mochkovitch… in Atmospheric Diagnostics of Stellar Evoluti… (1988)

Article

The neutrino emission of SN1987A

The appearance of a supernova in the Large Magellanic Cloud made it possible for the first time to detect the neutrino emission from the explosion of a stellar object. Several groups reported neutrino events, ...

R. Schaeffer, Y. Declais, S. Jullian in Nature (1987)

Chapter and Conference Paper

New Developments in Tunable-Diode-Laser Spectroscopy

Tunable Diode Laser Absorption Spectrometer (TOLAS) have been used throughout many years to expand our knowledge about molecular systems and molecular dynamics. This includes the study on neutral molecules, ra...

D. Haaks, W. Jalenak, R. Schaeffer… in Laser/Optoelektronik in der Technik / Lase… (1987)

Article

Precursors to Boron-Nitrogen Macromolecules and Ceramics

Boron nitride has been prepared in the past from classical high temperature reactions and more recently by CVD methods. Few attempts have been made to prepare this important material from pyrolyses of preceram...

C. K. Narula, R. T. Paine, R. Schaeffer in MRS Online Proceedings Library (1986)

Chapter

Influence Of Quark Nuggets on Primordial Nucleosynthesis

There are many indications that the baryonic content of the universe is rather low. The observation of the luminous matter in galaxies leads to a ratio Ω_bof the baryon density over the critical density of about 0...

R. Schaeffer, P. Delbourgo-Salvador… in Nucleosynthesis and Its Implications on Nu… (1986)

Chapter

Light Curves of Exploding Wolf-Rayet Stars

The removal of the extended hydrogen envelope surrounding the dense core of preexplosive stars by stellar winds or mass transfer onto a companion star, obviously, has consequences on the optical manifestation ...

S. Cahen, R. Schaeffer, M. Cassé in Nucleosynthesis and Its Implications on Nu… (1986)

Article

Influence of quark nuggets on primordial nucleosynthesis

It is possible that small droplets of quark matter, larger than ordinary nuclei, exist in nature¹. These ‘nuggets’ could be present in the Universe and provide one explanation for the dark matter. This suggestion...

R. Schaeffer, P. Delbourgo-Salvador, J. Audouze in Nature (1985)

Article

Lead isotope data from selected galena occurrences in the North Eifel and North Sauerland, Germany

The isotopic ratios of Pb have been determined from 33 galena samples collected from a variety of occurrences in the north Eifel and north Sauerland. On the basis of the data presented, it is not possible to d...

D. Large, R. Schaeffer, A. Höhndorf in Mineralium Deposita (1983)

Chapter and Conference Paper

Late Mesozoic to Tertiary Mineralization in the North-Eastern Sauerland (Rheinisches Schiefergebirge, Western Germany)

In the Paleozoic Sauerland Mountains there are many vein-type ore bodies and occurrences of “alpidic” (saxonian) age, and related strata-bound, epigenetic ores in the transgressive Mesozoic rocks (Permian, Cre...

R. Schaeffer in Mineral Deposits of the Alps and of the Alpine Epoch in Europe (1983)

Article

Two-body collisions and time dependent Hartree-Fock theory

The time-dependent Hartree-Fock (TDHF) theory is generalized in order to include the effect of two-body collisions (i.e. the residual interaction). This is achieved by adding a collision integral into the TDHF...

H. Orland, R. Schaeffer in Zeitschrift für Physik A Atoms and Nuclei (1979)

Chapter

An Improved Prescription for Calculating the Negative Parity Spectrum of Doubly-Closed Shell Nuclei

It is noted that T.D.A. and R.P.A. calculations for the negative parity states in doubly-closed shell nuclei with N=Z generally underestimate the splitting between the T=0 and T=1 members of a given multiplet....

F. Petrovich, R. Schaeffer, R. Trilling in The Two-Body Force in Nuclei (1972)

Chapter

α-Particle Intermediate State in the (h,t) Reaction

We report on preliminary calculations of the (h,t) reaction, assuming that the helion picks up a neutron, propagates some distance as an alpha, and then strips a proton. The following qualitative results are e...

G. Bertsch, R. Schaeffer in The Two-Body Force in Nuclei (1972)

Article

Ueber das Alter des Menstruationsbeginns

R. Schaeffer in Archiv für Gynäkologie (1908)