Results 41 to 50 of about 24,858 (303)

High Energy Density Laboratory Astrophysics

, 2007
During the past decade, research teams around the world have developed astrophysics-relevant research utilizing high energy-density facilities such as intense lasers and z-pinches.
Lebedev, Sergey V
core   +1 more source

Elucidating the Formation of Ethynylbutatrienylidene (HCCCHCCC; X1A′) in the Taurus Molecular Cloud (TMC-1) via the Gas-phase Reaction of Tricarbon (C3) with the Propargyl Radical (C3H3)

The Astrophysical Journal Letters, 2023
The recent astronomical detection of ethynylbutatrienylidene (HCCCHCCC)—a high-energy isomer of triacetylene (HCCCCCCH) and hexapentaenylidene (H _2 CCCCCC)—in TMC-1 puzzled the laboratory astrophysics community since proposed reaction pathways could not
Alexander M. Mebel, Marcelino Agúndez, José Cernicharo, Ralf I. Kaiser   +3 more
doaj   +1 more source

Double to Tenfold M-shell Photoionization of Singly Charged Lanthanum Ions

The Astrophysical Journal
Using the photon-ion merged-beams technique at the PETRA III synchrotron light source, we have measured cross sections for double and up to tenfold photoionization of La ^+ ions by a single photon in the energy range 820–1400 eV, where resonances and ...
Mirko Looshorn, B. Michel Döhring, Pierre-Michel Hillenbrand, Michael Martins, Alfred Müller, Simon Reinwardt, Jörn Seltmann, Florian Trinter, Shuxing Wang, Aloka Kumar Sahoo, Stephan Fritzsche, Stefan Schippers   +11 more
doaj   +1 more source

Detectors and Shieldings: Past and Future at LUNA

Universe
Nuclear reactions are responsible for the chemical evolution of stars, galaxies and the Universe. Unfortunately, at temperatures of interest for nuclear astrophysics, the cross-sections of the thermonuclear reactions are in the pico- femto-barn range and
Chemseddine Ananna, Lucia Barbieri, Axel Boeltzig, Matteo Campostrini, Fausto Casaburo, Alessandro Compagnucci, Laszlo Csedreki, Riccardo Maria Gesue, Jordan Marsh, Daniela Mercogliano, Denise Piatti, Duncan Robb, Ragandeep Singh Sidhu, Jakub Skowronski   +13 more
doaj   +1 more source

Nuclear astrophysics at Gran Sasso Laboratory: the LUNA experiment

EPJ Web of Conferences, 2018
LUNA is an experimental approach for the study of nuclear fusion reactions based on an underground accelerator laboratory. Aim of the experiment is the direct measurement of the cross section of nuclear reactions relevant for stellar and primordial ...
Cavanna Francesca
doaj   +1 more source

Laboratory Astrophysics White Paper

, 2006
Laboratory astrophysics and complementary theoretical calculations are the foundations of astronomical and planetary research and will remain so for many generations to come. From the level of scientific conception to that of the scientific return, it is
Federman, Steve, Salama, Farid, Brickhouse, Nancy, Stancil, Phillip, Weingartner, Joe, Ziurys, Lucy, Savin, Daniel Wolf, Kwong, Victor   +7 more
core   +1 more source

Shadow‐Free Back‐Contact Perovskite Thin‐Film Detectors for Direct Extreme‐Ultraviolet and Soft X‐Ray Sensing

Advanced Materials Interfaces, EarlyView.
A triple‐cation perovskite detector with a quasi‐interdigitated back‐contact architecture enables highly sensitive and linear EUV/soft x‐ray detection by minimizing electrode shadowing and enhancing charge extraction. Efficient interfacial carrier collection and rapid temporal response highlight the potential of back‐contact‐engineered perovskites for ...
Jingying Liu, Siqi Deng, Mosarof Hossain, Udo Bach, Kaijian Xing, Qingdong Ou   +5 more
wiley   +1 more source

Advances in instrumentation for nuclear astrophysics

AIP Advances, 2014
The study of the nuclear physics properties which govern energy generation and nucleosynthesis in the astrophysical phenomena we observe in the universe is crucial to understanding how these objects behave and how the chemical history of the universe ...
S. D. Pain
doaj   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

Cryogenic Differential Calorimetry: Exothermicity of Amorphous-to-crystalline Phase Transitions (ACPT) in Astrophysical and Cometary Ice Analogs

The Astrophysical Journal
Amorphous ice is understood to be the predominant phase of water in cometary nuclei. A significant number of other volatiles can be trapped in amorphous H _2 O ice and released during the amorphous-to-crystalline phase transition (ACPT).
Rahul K. Kushwaha, Murthy S. Gudipati, Bryana L. Henderson   +2 more
doaj   +1 more source