Article
Nuclear Science & Technology
Jian Zhong, Xiao-Guang Wu, Shi-Peng Hu, Ying-Jun Ma, Yun Zheng, Cong-Bo Li, Guang-Sheng Li, Bao-Ji Zhu, Tian-Xiao Li, Yan-Jun Jin, Yan-Xiang Gao, Qi-Wen Fan, Ke-Yan Ma, Dong Yang, Hui-Bin Sun, Hai-Ge Zhao, Lin Gan, Qi Luo, Zheng-Xin Wu
Summary: The lifetimes of different states in Nd-138 were measured experimentally, showing that Nd-138 is a transitional nucleus.
NUCLEAR SCIENCE AND TECHNIQUES
(2021)
Article
Physics, Nuclear
Kosuke Nomura
Summary: In this study, a model is presented that describes shape coexistence and quadrupole and octupole collective excitations using the nuclear density functional theory and the interacting boson model. The model incorporates configuration mixing and octupole degrees of freedom, and accurately predicts the energy levels and shapes of different nuclei.
Article
Chemistry, Multidisciplinary
Daedu Lee, Junghyun Song, Gyounghyun Song, Yoonsoo Pang
Summary: Silver colloidal films (SCFs) composed of nanoparticles were synthesized for optimal fluorescence enhancement using dipole and quadrupole surface plasmons. The fluorescence enhancement of chromophores was determined by the spectral overlap between the emission spectra and the SPR bands. This knowledge can be applied to develop sensitive fluorescence sensors.
NANOSCALE ADVANCES
(2022)
Article
Instruments & Instrumentation
M. Beckers, A. Dewald, C. Fransen, K. Arnswald, C. Mueller-Gatermann, F. von Spee
Summary: A new compact differential plunger device, the Cologne Compact Differential (CoCoDiff) plunger, has been developed and used in conjunction with various spectrometers and auxiliary detectors. The device was commissioned to measure the level lifetimes of the 2+1 and 4+1 excited states of 50Cr using the Differential Decay Curve method (DDCM). The experimental results obtained at the Cologne FN tandem accelerator using the reaction 24Mg(32S,4p2n)50Cr show good agreement with literature values.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Biochemical Research Methods
Pavel V. Bugrov, Aleksey A. Sysoev, Nikolai V. Konenkov
Summary: This study investigates several factors leading to the degradation of the mass peak shape in a quadrupole mass filter with round rods. The analytical representation of the ion motion equations is obtained by decomposing the rod set field into multipole fields. Simulations reveal that a parallel shift of electrodes results in a shift of the peak along the mass number axis and dips at the peak apex. Unbalance of supply voltages causes a shift in the peak's position along the mass axis and creates a jump in the quadrupole offset potential.
JOURNAL OF MASS SPECTROMETRY
(2023)
Article
Materials Science, Multidisciplinary
S. Sihotra, Ashutosh Kapil, Sanjeev Kumar, D. Mehta
Summary: Thin uniform targets of As-75 isotope with Pb/Au backing layer were prepared for nuclear structure studies and sub-picosecond lifetime measurements. The targets were fabricated by vacuum sublimation of As metal powder on to the Pb or Au backing layer prepared by rolling method. The targets were further rolled to improve uniformity and assessed using EDXRF technique. The prepared targets have been successfully used for in-beam γ spectroscopic studies in different isotopes.
Article
Telecommunications
Anouar Jerbi, Karine Amis, Frederic Guilloud, Tarik Benaddi
Summary: The conventional non-coherent differential detection of CPM is robust and simple, but has a lower SNR compared to coherent detection. This letter improves the error rate performance by using a delay higher than one symbol period. The trellis description, metrics, and optimized delay value are obtained through analysis and simulations.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Physics, Nuclear
T. X. Li, C. B. Li, Y. Zheng, X. G. Wu, J. Zhong, B. J. Zhu, Q. W. Fan, Y. X. Gao, Y. J. Jin, G. S. Li, L. H. Zhu
Summary: In this study, the lifetimes of negative-parity states in Ce-134 excited via a reaction were measured for the first time using the recoil-distance Doppler-shift technique. The experimental results show qualitative agreement with the shell model predictions, with an apparent gain of collectivity at higher excitation energies along the negative-parity yrast line. The quadrupole deformation derived from the B(E2) values confirms the predictions of the cranked Nilsson-Strutinsky Bogoliubov calculations for Ce isotopes and N = 76 isotones.
Article
Geochemistry & Geophysics
Xichao Dong, Jiaqi Hu, Cheng Hu, Zhiyang Chen, Yinghe Li
Summary: This article proposes a generalized PPP (GPPP) method for identifying non-Gaussian spectral signals (NGSS). Compared with traditional methods, the GPPP method has lower complexity and better performance under low signal-to-noise ratio conditions. Additionally, this method provides additional identification parameters to assist in selecting the appropriate spectral moment estimation algorithms for Gaussian or non-Gaussian spectral signals. The use of clustering algorithms for adaptive spectral moment estimation is also explored for the first time.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Benjamin Malvoisin, Lukas P. Baumgartner
Summary: Reactions in the Earth's crust mainly occur through dissolution-precipitation creep, leading to changes in the rock's microstructure. The pressure solution creep law can model both reaction- and diffusion-controlled cases, and introducing volume change allows for extension to replacement reactions.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Engineering, Multidisciplinary
Sahin Isik, Kemal Ozkan
Summary: An automated system for leaf species classification based on global and local features was presented in this study, achieving high accuracy rates. Experimental results showed superior performance when using the Inception-v3 model.
JOURNAL OF ENGINEERING RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Jianxiu Li, Urbashi Mitra
Summary: This paper investigates improved channel gain delay estimation strategies when utilizing practical pulse shapes with finite block length and transmission bandwidth. A novel pilot-aided channel estimation approach based on augmented atomic norm is proposed to enhance the low rank structure of the time-varying narrowband leaked channel. Different design choices are examined to ensure unique estimates of channel parameters for various pulse shapes in the noiseless case, and perturbation analysis is conducted to measure the impact of noise, leading to proposed design choices for parameters to mitigate noise effects. Numerical results validate the theoretical analysis and demonstrate performance enhancements compared to previous methods.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Physics, Particles & Fields
Jiaxing Zhao, Shuzhe Shi
Summary: By using a relativistic transport approach, it is found that the collective properties of final state hadrons produced in the high statistics Ru-96(44) + Ru-96(44) and Zr-96(40) + Zr-96(40) collisions at root sNN = 200 GeV are significantly different, which can be precise probes of the difference in nucleon distribution in the isobar nuclei. The yield ratio and elliptic flow of J/psi are sensitive to the differences in both the number of binary collisions and the medium evolution, and the ratio between Ru + Ru and Zr + Zr collisions can reflect the sensitivity to the medium evolution. The study of charmonium production provides an independent probe to study the nucleon distribution in the isobar system.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Nuclear
Asgar Hosseinnezhad, Amir Jalili Majarshin, Hadi Sabri
Summary: In this paper, a simple interacting boson model (IBM) is used to study the Cadmium isotopic chain, obtaining quadrupole transition rates and effective deformation. Energy spectra of some levels are determined, and the results show accuracy in describing regular states but notable deviation in predicting intruder energy levels. The study also reveals the relationship between effective quadrupole deformations and effective boson charge.
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2022)
Article
Geochemistry & Geophysics
Fulai Wang, Sijia Feng, Jiapeng Yin, Chen Pang, Yongzhen Li, Xuesong Wang
Summary: This article discusses the design of the ambiguity function in radar systems, proposes solutions, and verifies their performance.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Astronomy & Astrophysics
J. Saiz-Lomas, M. Petri, I. Y. Lee, I. Syndikus, S. Heil, J. M. Allmond, L. P. Gaffney, J. Pakarinen, H. Badran, T. Calverley, D. M. Cox, U. Forsberg, T. Grahn, P. Greenlees, K. Hadynska-Klek, J. Hilton, M. Jenkinson, R. Julin, J. Konki, A. O. Macchiavelli, M. Mathy, J. Ojala, P. Papadakis, J. Partanen, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Saren, S. Stolze, J. Uusitalo, R. Wadsworth
Summary: The spectroscopic quadrupole moment of the first 2(+) state of C-12 has been measured, suggesting a larger oblate deformation than previously reported. The most precise value to date is presented and is consistent with a geometrical rotor description. Comparison with other theories shows varying degrees of emergent quadrupole collectivity.
Article
Physics, Nuclear
C. M. Petrache, J. Uusitalo, A. D. Briscoe, C. M. Sullivan, D. T. Joss, H. Tann, O. Aktas, B. Alayed, M. A. M. Al-Aqeel, A. Astier, H. Badran, B. Cederwall, C. Delafosse, A. Ertoprak, Z. Favier, U. Forsberg, W. Gins, T. Grahn, P. T. Greenlees, X. T. He, J. Heery, J. Hilton, S. Kalantan, R. Li, P. M. Jodidar, R. Julin, S. Juutinen, M. Leino, M. C. Lewis, J. G. Li, Z. P. Li, M. Luoma, B. F. Lv, A. McCarter, S. Nathaniel, J. Ojala, R. D. Page, J. Pakarinen, P. Papadakis, E. Parr, J. Partanen, E. S. Paul, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Saren, J. Smallcombe, J. Sorri, S. Szwec, L. J. Wang, Y. Wang, L. Waring, F. R. Xu, J. Zhang, Z. H. Zhang, K. K. Zheng, G. Zimba
Summary: Three three-quasiparticle isomers in 129Nd with different excitation energies and half-lives have been identified using the MARA + JUROGAM 3 setup and recoil tagging technique. These isomers exhibit decay patterns characteristic of high-K isomers.
Article
Physics, Nuclear
K. Auranen, P. Siwach, P. Arumugam, A. D. Briscoe, L. S. Ferreira, T. Grahn, P. T. Greenlees, A. Herzan, A. Illana, D. T. Joss, H. Joukainen, R. Julin, H. Jutila, M. Leino, J. Louko, M. Luoma, E. Maglione, J. Ojala, R. D. Page, J. Pakarinen, P. Rahkila, J. Romero, P. Ruotsalainen, M. Sandzelius, J. Saren, A. Tolosa-Delgado, J. Uusitalo, G. Zimba
Summary: Two triaxial states of the proton-decaying nucleus 147Tm were studied by comparing experimental data with nonadiabatic quasiparticle calculations. The experimental data were collected using the MARA recoil separator and JUROGAM3 & gamma;-ray spectrometer. The level scheme proposed previously was confirmed and expanded to include the states above the weakly populated proton-emitting isomeric state. It was found that the isomeric state is also triaxial and possibly more deformed than the ground state.
Article
Physics, Nuclear
H. Kokkonen, K. Auranen, J. Uusitalo, S. Eeckhaudt, T. Grahn, P. T. Greenlees, P. Jones, R. Julin, S. Juutinen, M. Leino, A. -p. Leppanen, M. Nyman, J. Pakarinen, P. Rahkila, J. Saren, C. Scholey, J. Sorri, M. Venhart
Summary: The & alpha; decay of a new isotope 190At has been studied using a gas-filled recoil separator through the 109Ag(84Sr, 3n) 190At fusion-evaporation reaction. The measured & alpha;-particle energy is 7750(20) keV, and the half-life is 1.0+1.4 -0.4 ms. The measured decay properties suggest an unhindered & alpha; decay with the same spin and parity (-10) as the final state.
Article
Physics, Nuclear
X. Pereira-Lopez, M. A. Bentley, R. Wadsworth, P. Ruotsalainen, S. M. Lenzi, U. Forsberg, K. Auranen, A. Blazhev, B. Cederwall, T. Grahn, P. Greenlees, A. Illana, D. G. Jenkins, R. Julin, H. Jutila, S. Juutinen, X. Liu, R. Llewelyn, M. Luoma, K. Moschner, C. Mueller-Gatermann, B. S. Nara Singh, F. Nowacki, J. Ojala, J. Pakarinen, P. Papadakis, P. Rahkila, J. Romero, M. Sandzelius, J. Saren, H. Tann, S. Uthayakumaar, J. Uusitalo, J. G. Vega-Romero, J. M. Vilhena, R. Yajzey, W. Zhang, G. Zimba
Summary: A recoil-beta-tagging experiment was performed to study the excited T=0 and T=1 states in the Ag-94 nucleus, which is an odd-odd N=Z nucleus. The experiment used the MARA recoil separator and JUROGAM3 array at the University of Jyv & auml;skyl & auml;. Transitions between excited states in Ag-94 were identified by correlating fast beta decays with prompt gamma rays. The transitions were found to occur within and between the sets of states with T=0 and T=1.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Physics, Nuclear
W. Zhang, B. Cederwall, M. Doncel, O. Aktas, A. Ertoprak, C. Qi, T. Grahn, B. S. Nara Singh, D. M. Cullen, D. Hodge, M. Giles, S. Stolze, K. Auranen, H. Badran, T. Braunroth, T. Calverley, D. M. Cox, Y. D. Fang, P. T. Greenlees, J. Hilton, E. Ideguchi, R. Julin, S. Juutinen, M. Kumar Raju, M. Leino, H. Li, H. Liu, S. Matta, P. Subramaniam, V. Modamio, J. Pakarinen, P. Papadakis, J. Partanen, C. M. Petrache, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Saren, C. Scholey, J. Sorri, M. J. Taylor, J. Uusitalo, J. J. Valiente-Dobon
Summary: We report on a study of the alpha-decay fine structure and the associated E alpha-E gamma correlations in the decays of 171,172Os and 171,172,174Ir. We resolved 13 new alpha-decay energy lines and observed three new gamma-ray transitions. The weak alpha-decay branch from the nu i13/2 band in 171Os highlights an unusual competition between alpha, beta, and electromagnetic decays. The study reveals the sensitivity of alpha-decay fine structure to shape changes in the daughter nucleus.
Proceedings Paper
Physics, Multidisciplinary
J. Romero, K. Auranen, M. Block, A. D. Briscoe, T. Eronen, W. Gins, T. Grahn, P. T. Greenlees, A. Illana, R. Julin, H. Joukainen, H. Jutila, J. Khuyagbaatar, J. Krier, M. Leino, J. Louko, M. Luoma, P. Mosat, I. D. Moore, J. Ojala, A. Ortiz-Cortes, J. Pakarinen, P. Papadakis, A. M. Plaza, P. Rahkila, A. Raggio, P. Ruotsalainen, J. Saren, M. Sandzelius, A. Tolosa-delgado, J. Uusitalo, G. Zimba
Summary: The low energy branch for the MARA separator, MARA-LEB, is being constructed at the University of Jyvaskyla, Finland. It is designed for purifying and studying exotic beams through nuclear decay and laser spectroscopy. Two experiments have been conducted using the MARA separator to evaluate the gas cell and assess the feasibility of future experiments at the new facility. The experiments involved producing different reaction mechanisms and estimating their transmission into the LEB gas cell.
ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT
(2023)
Article
Astronomy & Astrophysics
K. Wimmer, P. Ruotsalainen, S. M. Lenzi, A. Poves, T. Huyuk, F. Browne, P. Doornenbal, T. Koiwai, T. Arici, K. Auranen, M. A. Bentley, M. L. Cortes, C. Delafosse, T. Eronen, Z. Ge, T. Grahn, P. T. Greenlees, A. Illana, N. Imai, H. Joukainen, R. Julin, A. Jungclaus, H. Jutila, A. Kankainen, N. Kitamura, B. Longfellow, J. Louko, R. Lozeva, M. Luoma, B. Mauss, D. R. Napoli, M. Niikura, J. Ojala, J. Pakarinen, X. Pereira-Lopez, P. Rahkila, F. Recchia, M. Sandzelius, J. Saren, R. Taniuchi, H. Tann, S. Uthayakumaar, J. Uusitalo, V. Vaquero, R. Wadsworth, G. Zimba, R. Yajzey
Summary: Excited states in Ga-62 and Ge-62 nuclei with Tz = 0, -1 were studied using direct reactions and fusion-evaporation reactions. New excited states were discovered and compared with theoretical predictions. In addition, the relationship between mirror and triplet energy differences was analyzed.
