Prof. Achim Richter

Publications on Symmetries and Invariance Principles (Isopin, Parity, Time Reversal)

PT Symmetry and Spontaneous Symmetry Breaking in a Microwave Billiard
S. Bittner, B. Dietz, U. Günther, H. L. Harney, M. Miski-Oglu, A. Richter, F. Schäfer
Phys. Rev. Lett. 108, 024101 (2012)
Induced Violation of Time-Reversal Invariance in the Regime of Weakly Overlapping Resonances
B. Dietz, T. Friedrich, H. L. Harney, M. Miski-Oglu, A. Richter, F. Schäfer, J. Verbaarschot, H. A. Weidenmüller
Phys. Rev. Lett. 103, 064101 (2009)
Induced Time-Reversal Symmetry Breaking Observed in Microwave Billiards
B. Dietz, T. Friedrich, H. L. Harney, M. Miski-Oglu, A. Richter, F. Schäfer, H. A. Weidenmüller
Phys. Rev. Lett. 98, 074103 (2007)
Isospin symmetry breaking in 93Tc and statistical properties
S. Åberg, A. Heine, G. E.Mitchell, A. Richter
Phys. Lett. B 598, 42 (2004)
Isospin mixing in the electroexcitation of the Ex = 10.84 MeV, Jπ; T = 1; 0 state in 12C at low momentum transfers
M. C. A. Campos et al.
Phys. Lett. B 349, 433 (1995)
Ericson fluctuations, detailed balance and time-reversal invariance
H. L. Harney, A. Hüpper, A. Richter
Nucl. Phys. A 518, 35 (1990)
Breaking of isospin symmetry in compound-nucleus reactions
H. L. Harney, A. Richter, H. A. Weidenmüller
Rev. Mod. Phys. 58, 607 (1986)
Improved Experimental Test of Detailed Balance and Time Reversibility in the Reactions 27Al + p ↔ 24Mg + alpha
E. Blanke et al.
Phys. Rev. Lett. 51, 355 (1983)
Autocorrelation function of fluctuating nuclear cross sections in the presence of isospin mixing
H.L. Harney, H.A. Weldenmüller, A. Richter
Nucl. Phys. A 394, 369 (1983)
Test of detailed balance at isolated resonances in the reactions 27Al + p ⇄ 24Mg +α and time reversibility
H. Driller et al.
Nucl. Phys. A 317, 300 (1979)
Correlations between mirror channels and isospin mixing in compound nucleus reactions
H. A. Weidenmüller, A. Richter, H. L. Harney
Phys. Rev. C 18, 1953 (1978)
Isospin forbidden electroexcitation of the 1 , T = 0 state at 6.95 MeV in 40Ca, continuum shell-model and effective charge of the convection current
H. D. Gräf, V. Heil, A. Richter, E. Spamer, W. Stock, O. Titze
Phys. Lett. B 72, 179 (1977)
Consequences of isospin mixing for compound nucleus reactions
H. L. Harney, H. A. Weidenmüller, A. Richter
Phys. Rev. C 16, 1774 (1977)
Present stauts of time-reversal invariance in the nuclear interactions
A. Richer
In: Interactions Studies in Nuclei, edited by H. Jochim and B. Ziegler (North-Holland, Amsterdam, 1975) 191 – 232
Isospin-forbidden electroexcitation of the 1 , T = 0 state at 7.12 MeV in 16O at low momentum transfers
H. Miska, H.D. Gräf, A. Richter, D. Schüll, E. Spamer, O. Titze
Phys. Lett. B 59, 441 (1975)
Time-reversibility violation and isolated nuclear resonances
J. M. Pearson, A. Richter
Phys. Lett. B 56, 112 (1975)
Search for the parity-forbidden heavy-particle width Γ′ of the Ex = 3.562 MeV state in 6Li
J. Barrette, W. Del Bianco, P. Depommier, S. Kundu, N. Marquardt, A. Richter
Nucl. Phys. A 238, 176 (1975)
The reaction 3H(3He, d)4He at very low energies: Energy dependent violations of the Barshay-Temmerisospin theorem and highly excited states in 6Li
U. Nocken, U. Quast, A. Richter, G. Schrieder
Nucl. Phys. A 213, 97 (1973)
Consequences of Isospin and Other Conserved Quantum Numbers for Compound-Nucleus Reactions
D. Robson, A. Richter, H. L. Harney
Phys. Rev. C 8, 153 (1973), Erratum: Phys. Rev. C 11, 1867 (1975)
Isospin Nonconservation in the Reaction 12C(d,α2)10B(1.74,T=1)
D. von Ehrenstein, L. Meyer-Schützmeister, J. E. Monahan, A. Richter, J. C. Stoltzfus
Phys. Rev. Lett. 27, 107 (1971)
Reaction symmetries for multiplet production
D. Robson, A. Richter
Ann. Phys. (N.Y.) 63, 261 (1971)
Distorted-Wave Analysis of Charge Asymmetry Effects in the Reaction d(α,t)3He
A. Richter, C. M. Vincent
Phys. Rev. Lett. 25, 1460 (1970)
Isospin Nonconservation in the 28Si(d,alpha1)26Al0.23,T=1 Reaction
A. Richter, L. Meyer-Schützmeister, J. C. Stoltzfus, and D. von Ehrenstein
Phys. Rev. C 2, 1361 (1970)
Test of the Barshay-Temmer theorem for the reaction 10B + α → 7Li + 7Be
H.T. Fortune, A. Richter, B. Zeidman
Phys. Lett. B 30, 175 (1969)
Test of Time-Reversal Invariance through the Reactions 24Mg+α⇌27Al+p
W. Von Witsch, A. Richter, P. Von Brentano
Phys. Rev. 169, 923 (1968)
Upper Limit of T Nonconservation in the Reactions 24Mg+α⇄27Al+p
W. von Witsch, A. Richter, P. von Brentano
Phys. Rev. Lett. 19, 524 (1967)
A test of time – reversal invariance in the reactions 24Mg(α,p)27Al and 27Al(p,α)24Mg
W. von Witsch, A. Richter, P. von Brentano
Phys. Lett. 22, 631 (1966)